FINAL DRAFT UGANDA 
STANDARD  
  FDUS EAS 148-5 
First   Edition  
2018-mm-dd 
 
 Reference number  
FDUS EAS 148-5: 2017 
© UNBS 201 8 
  
Cements  — Test Methods  — Part 5: Pozzolanicity test for 
pozzolanic cements  
 FDUS EAS 148 -5:2017 
ii                © UNBS  2018  - All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Use rs are 
responsible for its correct application  
© UNBS 2018  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfil m, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 7 333 2 50/1/2 
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 FDUS EA S 148 -5:2018 
© UNBS  2018  - All rights reserved                 iii National foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, as amended.  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the Nat ional Enquiry Point on TBT Agreement of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and con sists of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committ ee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Uganda Standard, US EAS 148 -5: 2017, Cement — Test methods — Part 5: Pozzolanicity test for 
pozzolanic cements , is identical with and has been reproduced from an East African Standard, EAS 148 -5: 
2017 , Cement — Test methods — Part 5: Pozzolanicity test for pozzolanic cements , and adopted as a 
Uganda Standard.  
The committee responsible for this document is Technical Committee UNBS/TC 3, Building and construction .  
This standard cancels and replaces US 100 -5:2001/EAS 148 -5 Methods of testing Cement - Part 5: 
Pozzolanicity test for pozzolanic cements , which has been technically revised.  
.  
  EAS 148 -5: 201 7 
ICS 91.100.10  
© EAS  2017                                                                                                                          Second  Edition 2017   
 
EAST AFRICAN STAND ARD  
Cements  — Test Methods  — Part 5: Pozzolanicity test for pozzolanic 
cements  
 
EAST AFRICAN COMMUNITY  
 
 
 
 
  
 EAS 148 -5: 201 7 
ii © EAC 2017 – All rights reserved  
 Copyright notice  
This EAC document is copyright -protected by EAC. While the reproduction of this document by 
participants in the EAC standards de velopment process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
any other purpose without prior written permission from EAC.  
Requests for permission to  reproduce this document for the purpose of selling it should be addressed 
as shown below or to EAC’s member body in the country of the requester:  
© East African Community  2017 — All rights reserved  
East African Community  
P.O.Box 1096  
Arusha  
Tanzania  
Tel: 255 27 2504253/8  
Fax: 255 27 2504481/2504255  
E-mail: eac@eachq.org  
       Web: www.eac -quality.net  
Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be persecuted  EAS 148 -5: 201 7 
© EAC 2017  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 General requirements for testing  ................................ ................................ ................................ .........  1 
3.1 Number of tests  ................................ ................................ ................................ ................................ ..... 1 
3.2 Repeatability and reproducibility  ................................ ................................ ................................ .........  1 
3.3 Expression of masses, volumes and factors  ................................ ................................ .....................  1 
3.4 Determination of constant mass  ................................ ................................ ................................ ..........  2 
4 Preparation of a cement sample  ................................ ................................ ................................ ..........  2 
5 Principle  ................................ ................................ ................................ ................................ .................  2 
6 Reagents  ................................ ................................ ................................ ................................ ................  2 
6.1 Quality of reagents  ................................ ................................ ................................ ................................ ....... 2 
6.2 Types of reagents  ................................ ................................ ................................ ................................ .........  2 
7 Apparatus  ................................ ................................ ................................ ................................ ...............  3 
8 Standardization of solutions  ................................ ................................ ................................ ................  4 
8.1 Standardization of the EDTA solution  ................................ ................................ ................................ . 4 
8.2 Standardization of the 0, 1 mol/L solutio n of hydrochloric acid  ................................ ......................  5 
9 Procedure  ................................ ................................ ................................ ................................ ...............  5 
9.1 Storage and filtration  ................................ ................................ ................................ ............................  5 
9.2 Determination of the hydroxyl ion concentration  ................................ ................................ ..............  6 
9.3 Determination of the calcium oxide concentration  ................................ ................................ ............  6 
10 Results  ................................ ................................ ................................ ................................ ....................  6 
10.1  Calculation and expression of results  ................................ ................................ ................................  6 
10.2  Assessment of results  ................................ ................................ ................................ ..........................  7 
10.3  Repeatability and reproducibility  ................................ ................................ ................................ .........  7 
11 Reporting of results  ................................ ................................ ................................ ..............................  8 
 EAS 148 -5: 201 7 
iv © EAC 2017 – All rights reserved  
 Foreword  
Development of the East African Standards has been necessitated by the need for harm onizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Community will be r emoved.  
In order to achieve this objective, the Community established an East African Standards Committee mandated 
to develop and issue East African Standards.   
The Committee is composed of representatives of the National Standards Bodies in Partner State s, together 
with the representatives from the private sectors and consumer organizations. Draft East African Standards 
are circulated to stakeholders through the National Standards Bodies in the Partner States. The comments 
received are discussed and incor porated before finalization of standards, in accordance with the procedures 
of the Community.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
EAS 148-5 was prepared by Technical Committee EASC /TC/026, Cement, lime, clay and related products . 
In the preparation of this East African Standard, reference was made to the fo llowing standard:  
EN 196 -5: 2011; Methods testing cement - Part 5: Pozzolanicity test for pozzolanic cements.  
The assistance de rived from the above source is hereby acknowledged with thanks.  
This second edition cancels and replaces the first edition (EAS  148-5: 2000), which has been technically 
revised.  
EAS 148 consists of the following parts, under the general title Cements  — Test methods : 
Part 1: Determination of strength  
Part 2: Chemical analysis of cement  
Part 3: Determination of setting times and  soundness  
Part 4: Quantitative Determination of constituents  
Part 5: Pozzolanicity test for pozzolanic cements  
Part 6: Determination of fineness  
 Part 7: Method of taking and preparing samples of cement  
 Part 8: Heat of hydration – Solution method   
 EAST AFRICAN STANDARD  EAS 148 -5:201 6 
 
© EAC 2016  – All rights reserved  1 
 Cement — Test methods — Part 5 : Pozzolanicity test for pozzolanic 
cements  
1 Scope  
This East African Standard specifies the  method of measuring the pozzolanicity of pozzolanic cements 
conforming to FDEAS 18 -1. This standard does not apply to Portland po zzolana cements or to pozzolanas.  
2 Normative references  
The following referenced documents are indispensable for the application of this document. For dated 
references, only the edition cited applies. For undated references, the latest edition of the ref erenced 
document (including any amendments) applies.  
EAS 18 -1, Cement — Part 1: Composition, specification and conformity criteria for common cements  
EAS 148 -7, Cements — Test methods — Part 7: Methods of taking and preparing samples  
ISO 385, Laboratory g lassware — Burettes  
ISO 835, Laboratory glassware — Graduated pipettes  
3 General requirements for testing  
3.1 Number of tests  
3.1.1  Where the determination is one of a series subject to statistical control, determination by a single test 
shall be the m inimum required.  
3.1.2  Where the determination is not part of a series to statistical control, the number of tests shall be two 
(see 10.1)  
3.1.3  In the case of dispute, the number of tests shall be two.  
3.2 Repeatability and reproducibility  
Repeatability a nd reproducibility in this document are expressed as repeatability standard deviations(s) and 
reproducibility standards deviation(s).  
3.3 Expression of masses, volumes and factors  
Express masses in grams to the nearest 0.0001 g and volumes from the burette  in millilitres to the nearest 
0.05 mL. Express the factors of solutions, given by the mean of three determinations to three decimal places.  EAS 148 -5: 201 7 
2 © EAC 2017 – All rights reserved  
 3.4 Determination of constant mass  
Determine constant mass by drying for successive periods at the stated tempera ture, or making successive 
15 min ignitions, followed each time by cooling and then weighing. Constant mass is reached when the 
difference between two successive weighings is less than 0.0005 g.  
4 Preparation of a cement sample  
4.1 Before starting the de terminations, treat the laboratory sample, taken in accordance with FDEAS 148 -7, 
as follows to obtain a homogenous test sample.  
4.2 Take approximately 100 g of the sample using a simple divider or by quartering. Sieve this portion a 
150-µm or 125 –µm sieve until the residue remains constant. Grind the retained material so that it completely 
passes the 150 –µm or 125 –µm sieve. Transfer the sample to a clean dry container with an airtight closure and 
shake vigorously to mix it thoroughly.  
4.3 Carry out all ope rations as quickly as possible to ensure that the sample is exposed to ambient air only 
for the minimum time.  
5 Principle  
The pozzolanicity is assessed by comparing the quantity of calcium ion, expressed as calcium oxide, present 
in the aqueous solution in  contact with the hydrated cement, after a fixed period of time, with the quantity of 
calcium ion capable of saturating a solution of the same alkalinity. The cement is considered to satisfy the 
test, it gives a positive result, if the concentration of cal cium ion in the solution is lower than the saturation 
concentration.  
NOTE  Experiment has shown that a mixture of 20 g of cement and 100 mL of water at 40 °C achieves equilibrium 
after a period of between 8 days or 15 days. If the cement satisfies the test  at 8 days (see 10.2) it is not necessary to 
continue to 15 days.  
6 Reagents  
6.1 Quality of reagents   
Only reagents of analytical quality  shall be used . The quantities of reagents listed are to indicate 
concentrations; actual quantities to be prepared shal l be adjusted according to the amounts required.  
NOTE 1  References to water mean distilled or de -ionised water having an electrical conductivity ≤ 0.5 mS/m.   
NOTE 2  Unless otherwise stated, the symbol % means percent by mass.  
6.2 Types of reagents  
6.2.1  Concentrated hydrochloric acid  (HCl), (ρ= 1.18 g/cm3 to 1.19 g/cm3).  
6.2.2  Hydrochloric acid , about 0.1 mol/L, prepared by measuring with a graduated cylinder (7.16)  8.5 mL 
of concentrated acid (6.2.1) to a 1 -L volumetric flask ( 7.10)  containing about 500 m L of water Then make up to 
1 000 mL with water. Determine the factor of normality of the solution as indicated in 8.2  
6.2.3  Dilute -hydrochloric acid (1 + 2), prepared by adding 250 mL of concentrated hydrochloric acid 
(6.2.1) to 500 mL water  
6.2.4  Methyl orange, (dimethylaminoazobenzene p -sodium sulfonate)  EAS 148 -5: 201 7 
© EAC 2017  – All rights reserved  3 
 6.2.5  Methyl orange  indicator,  prepared by dissolving (0.020 ± 0.002) g of methyl orange ( 6.2.4) in water 
and making up 1 000 mL.  
6.2.6  Sodium hydroxide  (NaOH).  
6.2.7 Sodium hydroxide solution, prepar ed by  dissolving (100 ±1) g of sodium hydroxide  (6.2.6) in water 
and making up to 1  000 m L.  
6.2.8 Calcium carbonate  (CaCO 3), dried to constant mass at (200 ± 10) °C  (purity greater than 99.9  %). 
6.2.9 Sodium chloride  (NaCI), dried to constant mass at (110  ± 5) °C  
6.2.10  Murexide , (ammonium purpurate)  
6.2.11  Murexide indicator,  prepared by grinding  (1.0 ± 0.1) g of murexide with  (100 ± 1) g of dry sodium 
chloride  (NaCl ).  
6.2.12  EDTA, ( dehydrated disodium salt of ethylenediaminetetra -acetic acid),  
6.2.13  EDTA solution,  about  0.03 mol/ L, prepared  by dissolv ing (11.17  ± 0.01)  g of EDTA in water and 
making up to 1  000 m L. Store in an airtight polyethylene container.  Determine the factor of molarity of the 
solution as indicated in 8.1 . 
6.2.14   Sodium carbo nate, (Na 2CO 3): dried to constant mass at (250 ± 10) °C. 
6.2.15   Mixed calcein and methylthymol blue indicator, prepared by grinding(0.20  ± 0.02)  g calcein  
(bis[bis(carboxymethyl) -amino -methyl])  -2’, 7’-fluorecein(fluorecein,  Flurorescein di -(methylimino d iacetic 
acid)sodium salt) and (0.10  ± 0.01)g methylthymol blue,  sodium salt of 3’,3’’ -bis-[bis(carboxy -methyl) -
aminomethyl] -thymolsulfophthlein,(C 37H41N2O13SNa 3 with(100  ± 1) g of potassium Nitrate(KNO 3). 
6.2.16  Calcon indicator , prepared by grinding(1.0 ± 0.1) g of calcon, sodium 2 -hydroxy -4-(2-hydroxy -1-
napthylazo) napthalen -1-sulfonate,(Eriochrome Blue -Black R) with (100 ± 1) g of anhydrous sodium sulphate 
(Na 2SO 4). 
6.2.17  Patton and Reeders reagent , prepared by mixing (1.0 ± 0.1) g of calcon carboxyli c acid, (2 -
hydroxy -1-(2-hydroxy -4-sulfo -1-napthylazo) -3-naphtoic acid, (C 21H14N2O7S), with (100 ± 1) g of anhydrous 
sodium sulphate (Na 2SO 4). 
7 Apparatus   
7.1 500–mL cylindrical polyethylene container  of about 70 mm diameter with a pressure seal –lug locked  
by screw plug capable of preventing evaporation during storage.  
7.2 Wide stem funnel  
7.3 Porcelain Buchner funnel,  of 60 mm inner diameter  
7.4 Filter paper,  with low porosity (mean pore diameter of about 2 m) 
7.5 250–mL vacuum flask  
7.6 250–mlL and 400 –mL beakers  
7.7 50–mL and 100mL precision pipettes  conforming to ISO 835  
7.8 50–mL precision burettes, Class A conforming to  ISO 385  EAS 148 -5: 201 7 
4 © EAC 2017 – All rights reserved  
 7.9 Uniform temperature enclosure,  controlled thermostatically at (40  1) C 
7.10 500–mL and 1 000 mL volumetric flasks  
7.11 250-mL conical flask  
7.12 Balance , capable of weighing to an accuracy of  0.0005 g  
7.13 Apparatus for measuring the absorbance , at 520 nm and 620 nm of a solution contained in a titration 
beaker, while stirring  
7.14 Stirrer , for example magnetic stirrer , with inert, for example PTFE, covered bar  
7.15 pH meter , capable of measuring to an accuracy of  0.05 
7.16 Graduated cylinder of 10  mL or 20  mL 
8 Standardization of solutions  
8.1 Standardization  of the EDTA solution  
8.1.1  Weigh to an accuracy of ± 0.0005 g (1.00 ± 0.01) g of calcium carbonate (6.2.8), m1 and place it in a 
400 -mL beaker (7.6) with approximately 100 mL of water. Cover the beaker with a watch glass and carefully 
introduce approximately 10 mL of hydrochloric acid (1+2) (6.2.1). Stir with a glass rod and ensure that 
dissolution is complete, bring to the boil in order to expel the dissolved carbon dioxide. Cool to room 
temperature, transfer to a volumetric flask (see 7.10), wash the beaker and watch glass carefully with water, 
adding the was hings to the solution and make up to 1 000 mL with water.  
8.1.2  Pipette 50 mL of the calcium solution into a beaker suitable for the measuring apparatus (7.13). Then 
dilute with water to a volume suitable for the operation of the apparatus. Using a pH mete r (7.15), adjust the 
pH of this solution to (12.5 ± 0.2) with the sodium hydroxide solution (6.2.7).  
8.1.3  Determine the end –point using one of the following two methods:  
a) Photometric determination of the end -point (reference method): Add, without weighing,  approximately 
0.1 g of murexide indicator (6.2.11) or of mixed indicator (6.2.15). Place the beaker in the 
apparatus(see 7.13) set  at 620 nm when using murexide or at 520 nm when using the mixed 
indicator and, while stirring continuously, titrate with 0. 03 mol/L EDTA solution (6.2.11). In the vicinity 
of the colour change, construct a curve giving the absorbance values as a function of the volume of 
EDTA added. The volume v1 used is determined from the intersection of the line of gre atest slope 
near the c olour change and the line of almost constant absorbance after the colour change.  
Calculate the factor, f1 of the EDTA solution from the formula:  
16.652
0.03 100.0950
11
11
1 

vm
vmf
 (1) 
where  
m1 is the mass of calcium carbonate, in grams;  
v1 is the volume of EDTA solu tion used for the titration, in millilitres;  
100.09  is the molecular mass of calcium carbonate  EAS 148 -5: 201 7 
© EAC 2017  – All rights reserved  5 
 b) Visual determination of the end -point (alternative method): Add, without weighing, about 0.1 g of the 
calcon indicator (6.2.16), or Patton and Reeders reage nt mixture (6.2.15). Stir and titrate with the 0.03 
mol/lL EDTA solution (6.2.13) until the colour changes from pink to blue (purple to clear blue for Patton 
and Reeders reagent), and one drop in excess does not further increase the intensity of the blue c olour. 
The volume 
1V  is used to calculate the standardization factor 𝑓1 using the formula (1).  
8.2 Standardization of the 0, 1 mol/L solution of hydrochloric acid  
8.2.1  Weigh, to an accuracy of  0.0005 g,(0.200  0.001) g of sodium c arbonate (6.2.12), m2, add it to the 
250 mL conical flask (7.11) and dissolve it in 50 mL - 75 mL of water. Add five drops of the methyl orange 
indicator (6.2.3) to the solution and titrate with the 0.1 mol/L dilute hydrochloric acid (6.2.3) until the colou r 
changes from yellow to orange.  
8.2.2  Calculate the factor f2 of the hydrochloric acid solution by the formula:  
188.70
0.10001
105.9892
22
222

vm
vmf
  (.2) 
where;  
f2 is the factor of the hydrochlo ric acid;  
m2 is the mass of sodium carbonate, in grams;   
V2 is the volume of hydrochloric acid used for the titration, in millilitres;  
105.989  is the molecular  mass of sodium carbonate.  
9 Procedure  
9.1 Storage and filtration  
9.1.1  Pipette 100 mL of fre shly boiled water into the polyethylene container (7.1) and place the sealed 
container in the thermostatic enclosure (7.9) until equilibrium is reached (about 1 h). Remove the container 
from the thermostatic enclosure. Pour (20 ± 0.01) g of the cement to b e examined into it, using the wide stem 
funnel (7.2). Immediately seal the container hermetically.  
9.1.2  Shake vigorously for about 20 s to avoid formation of cement lumps. A horizontal rotary motion shall 
be used to prevent any part of the sample or liqu id being thrown up and remaining separated from the rest of 
the solution.  
9.1.3  Replace the container in the thermostatic enclosure, making sure that its base is perfectly horizontal 
so that the deposited layer of cement has a uniform thickness. Perform a ll operations outside the thermostatic 
enclosure as quickly as possible (in 1 min maximum) to avoid any appreciable lowering in temperature of the 
contents of the container.  
9.1.4  After a period of 8 days or 15 days in the thermostatic enclosure, remove th e container and filter the 
solution immediately under vacuum through the Buchner funnel (7.3) into the vacuum flask (7.5) using dry 
double filter paper (7.4) in less than 30 s (to avoid absorption of atmospheric carbon dioxide and any 
appreciable lowering in temperature of the solution). Seal the vacuum flask immediately and let the filtrate cool 
to room temperature.  
NOTE  If the cement certifies the test at 8 days (10.2) it is not necessary to continue to 15 days.  EAS 148 -5: 201 7 
6 © EAC 2017 – All rights reserved  
 9.2 Determination  of the hydroxyl ion conc entration  
9.2.1  Shake the vacuum flask (7.5) to homogenize the filtrate and pipette 50 mL of the solution into the 
250–mL beaker (7.6).  Add five drops of methyl orange indicator (6.5)  and determine the total alkalinity with 0.1 
mol/L dilute hydrochloric a cid (6.2.3). The titration end -point corresponds to the colour change from yellow to 
orange. Keep the titrated solution, A, for the determination of calcium oxide concentration (9.3).  
9.2.2  Calculate the hydroxyl ion concentration [OH]–, in millimoles per  litre, from the formula:  
2 322
500.1 0001[OH]3- fVV f
 (3) 
Where;  
[OH]–, is the hydroxyl ion concentration in millimoles per litre;  
v3 is the volume of 0.1 mol/L hydrochloric  acid solution used for the titration, in millilitres;  
f2 is the factor of 0.1 mol/L hydrochloric  acid solution.  
9.3 Determination of the calcium oxide concentration  
Using the titrated solution, A, remaining after completing 9.2, adjust pH to (12.5  0.2) with sodium hydroxide 
solution (6.9),  using the pH meter (7.15). Titrate with 0.03 mol/L EDTA solution (6. 2.13) determine the end -
point by one of the method s in 8.1 . Before and after titration, the pH value of the solution shall be at least  13; if 
not, add the requisite amount of sodium hydroxide solution.  
Calculate the calcium oxide co ncentration [CaO]  in millimoles per litre, from the formula:  
1 4 14 0.6
500.03 0001[CaO] fv fv 
 (4) 
where  
[CaO]   is the calcium oxide concentration in millimoles per litre;  
v4 is the volume of EDTA solutio n used for the titration, in millilitres; and  
f1 is the factor of the EDTA solution.  
10 Results   
10.1 Calculation  and expression of results  
10.1.1  Calculate the concentration of hydroxyl ion and calcium ion (expressed as calcium oxide), each 
expressed to the nearest 0.1 mmol/L  
10.1.2  Express the results, where two test results have been obtained, as the mean of the results the nearest 
0.1 mmol/L.  
10.1.3  If the two test results differ by more than twice the standard deviation of repeatability, repeat the te st 
and take the mean of the two closest results.  EAS 148 -5: 201 7 
© EAC 2017  – All rights reserved  7 
 10.2 Assessment  of results  
10.2.1  Plot the concentrations  of hydroxyl ion and calcium ion, (expressed as calcium oxide) in the solution, 
obtained in accordance with 10.1, as a point on Figure 1, which shows  the saturation concentration of calcium 
ion (expressed as calcium oxide) as the function of hydroxyl ion concentration at 40 C. The curve in Figure 1 
may be expressed mathematically over the range 45 mmol/L 90 mmol/L (OH) by (CaO) = 350 / ([OH] – 15.0) 
where the calcium ion (expressed as calcium oxide) and hydroxyl ion concentration are given in millimoles per 
litre  
10.2.2  The cement satisfies the test for pozzolanicity when the point plotted is below the curve of calcium ion 
(expressed as calcium oxide)  saturation concentration shown on Figure 1.  
10.3 Repeatability and reproducibility  
10.3.1  The standard deviation for repeatability is:  
a) for calcium oxide: 0.2 mmol/L;  
b) for hydroxyl ion : 0.5 mmol/L.  
10.3.2  The standard deviation for reproducibility is:  
a) for calcium oxide : 0.5 mmol/L;  
b) for hydroxyl ion : 1.0 mmol/L.  
 
Figure 1 — Diagram for assessing pozzolanicity  EAS 148 -5: 201 7 
8 © EAC 2017 – All rights reserved  
 Key 
1 Pass  
2 Fail 
X Hydroxyl ion concentration, mmol/L  
Y Calcium ion concentration (expressed as calcium oxide), mmol/L  
11 Reporting of results  
 Record all individual results. Where the cement has been shown to satisfy (or not satisfy) the test for 
pozzolanicity as determined in clause 10, it shall be reported that:  
 This cement satisfies (does not satisfies) the test for pozzolanicity according to FDEAS 148 – 5. EAS 148 -5: 2015    
 
© EAC 2017 – All rights reserved  
  
 Bibliography  
[1] EN 196 -5: 2011; Methods testing cement - Part 5: Pozzolanicity test for pozzolanic cements.