            Vol.113 December 20188
 &"! %$ ! ("# !& !* ' "$ %$ !%&&'&                                )%&&$ "  #& $ 
◊✲ࢥ࣒ࣛ 㗰ᶫࡢྛ✀⣲ᆅㄪᩚ࡟ࡼࡿሬ⿦ᛶ⬟࡬ࡢᙳ㡪ホ౯      㗰ᵓ㐀≀ሬ⿦࡟࠾ࡅࡿ⣲ᆅㄪᩚࡣࠊሬ⿦๓ࡢ㗰ᮦࢆ◊

Evaluation of surface preparation of steel☻ࡍࡿ࡞࡝ࡋ࡚⾲㠃࡟ࡘ࠸ࡓἜศࠊ㗵࡞࡝ࢆ㝖ཤࡍࡿస

substratesᴗ࡛ࡍࠋࡇࡢసᴗࡣሬ⭷ࡢ௜╔ᛶࠊ㜵㣗ᛶࠊ⪏ஂᛶࢆᕥྑࡍࡿࡓࡵ㔜せ࡞ᕤ⛬࡛ࡍࠋሬ᭰࠼ሬ⿦ࢆࡍࡿሙྜࡢ⣲Surface preparation of a steel structure paint system isᆅㄪᩚ࡜ࡋ࡚ࠊ
ࠕ㗰㐨㊰ᶫ㜵㣗౽ぴ࡛ࠖࡣࠊ⣽࠿࡞⢏Ꮚࢆan important work process to remove adhering㐃⥆ⓗ࡟⾪✺ࡉࡏ࡚⾲㠃ࢆ◊๐ࡍࡿࣈࣛࢫࢺฎ⌮ᕤἲࢆ

substances, such as oil, stains, and rust. This processᶆ‽࡜ࡋ࡚࠸ࡲࡍࡀࠊᕤ஦ୖࡢไ⣙࡞࡝࡟ࡼࡗ࡚ࣈࣛࢫ

influences the adhesive property, anticorrosionࢺࡀ㐺⏝࡛ࡁ࡞࠸ሙྜ࡟ࡣࠊࡼࡾ⡆౽࡞ࠊࢹ࢕ࢫࢡࢢࣛ

property, and durability of the steel system. Blasting is࢖ࣥࢲ࣮࡞࡝ࢆ⏝࠸ࡓືຊᕤලฎ⌮ᕤἲ࡟ࡼࡿ⣲ᆅㄪᩚthe standard method according to the specifications forࡶᐜㄆࡋ࡚࠸ࡲࡍࠋ୍᪉࡛ࠊሬ⭷๤㞳๣ࡸ㟁☢ㄏᑟຍ⇕

highway bridges; however, a simpler method using(IH)ࠊ࣮ࣞࢨ࣮࡞࡝ࢆ⏝࠸ࡓ᪂ࡋ࠸⣲ᆅㄪᩚ᪉ἲࡶᥦ᱌ࡉ

power tools, such as disk grinder, is also acceptedࢀ࡚࠾ࡾࠊࡇࢀࡽࡢ⣲ᆅㄪᩚᛶ⬟ࡸసᴗ᫬ࡢᏳ඲ᛶࢆホ

under restricted construction sites. Paint removers,౯ࡍࡿࡇ࡜ࡀồࡵࡽࢀ࡚࠸ࡲࡍࠋ

electromagnetic induction heating (IH), and laserࡑࡇ࡛ iMaRRC ࡛ࡣࠊࡇࢀࡽࡢ⣲ᆅㄪᩚ࡟ࡼࡗ࡚ᚓࡽ

application are also suggested for surface preparation.

ࢀࡓ㗰ᮦ⾲㠃ࢆ㢧ᚤ㙾ほᐹࡸ⏬ീィ ࡞࡝ࡢ᪉ἲ࡛ẚ㍑

Each type of surface preparation has a set ofࡋࠊ⾲㠃ࡢᙧ≧ࠊ㗵ࡢ㝖ཤ⋡ࠊṧᏑࡍࡿሷศ㔞࡞࡝ࢆඖcharacteristics (Figure 1). Information on the࡟ࠊ⣲ᆅㄪᩚࡢホ౯ἲࢆ᳨ウࡋ࡚࠸ࡲࡍࠋ౛࠼ࡤࣈࣛࢫ

performance and safety of each surface preparation isࢺฎ⌮࡛ࡣ㗰ᮦ⾲㠃ࡣつ๎ᛶࡢ࡞࠸พฝ࡟࡞ࡾࡲࡍࡀࠊ

required to conduct a fair evaluation of the process.

ືຊᕤලฎ⌮࡛ࡣ◒▼ࡀᅇ㌿ࡋ࡚◊☻ࡍࡿࡓࡵࠊ⾲㠃࡟Innovative Materials and Resources Research Center➽≧ࡢพฝࡀぢࡽࢀࡲࡍࠋ࣮ࣞࢨ࣮ࢆ฼⏝ࡋࡓ⣲ᆅㄪᩚ

(iMaRRC) has been investigating evaluation methods࡛ࡣ㧗 ࡛௜╔≀ࢆ⵨Ⓨࡉࡏࡿࡓࡵࠊ㗰ᮦࡀ⁐ゎࡋࡓ㊧for surface preparation using microscopic observationࡀ࣮ࣞࢨ࣮ࡢ㌶㊧ࢆ࡞ࡒࡗ࡚ṧࡾࡲࡍ(Figure 1)ࠋ
ࡑࢀࡒࢀor image processing for steel structures. Figure 1࡟≉ᚩࡀ࠶ࡾࡲࡍࡀࠊ㐺ᮦ㐺ᡤࡢ౑࠸ศࡅࢆᥦ᱌ࡋࠊ༑

shows the microscopic images for various surfaceศ࡞ᛶ⬟ࢆ♧ࡍᇶ‽್ࢆᑟࡃホ౯᪉ἲࢆ㛤Ⓨࡍࡿࡇ࡜࡛ࠊ

preparation methods. We aim to develop theከᵝ࡞᪉ἲࢆᣢࡗ࡚♫఍࢖ࣥࣇࣛᵓ㐀≀ࡢ࣓ࣥࢸࢼࣥࢫ

evaluation method to lead standard value for ensuringࢆྜ⌮໬ࡋࠊಙ㢗ᛶ㧗ࡃ⥔ᣢࡍࡿࡇ࡜ࢆ┠ᣦࡋ࡚࠸ࡲࡍࠋ


sufficient performance by utilizing their ownͤᐇ㦂ື⏬➼ࡢ࣮࣌ࢪ(short video)

individuality. 

http://www.pwri.go.jp/team/imarrc/activity/movie.html


(a)







(c)

Figure 1: Microscopic and corresponding 3D images of the surface after (a) sand blast, (b) power tool, and (c) laser irradiation
treatments.




(b)

%! $#  '!" %  ) 
&!#$# $%%&%                            ($%%#! # ◊✲ࢥ࣒ࣛ ሷศࢭࣥࢧࢆά⏝ࡋࡓ⡆᫆࡞ሷᐖデ᩿ᢏ⾡         ࢥࣥࢡ࣮ࣜࢺᵓ㐀≀୰ࡢ㗰ᮦࡣࠊ࠿ࡪࡾࢥࣥࢡ࣮ࣜࢺ࡟ࡼࡾಖㆤࡉࢀ࡚࠸ࡲࡍࡀࠊࡇࡢࢥࣥࢡ࣮ࣜࢺ୰࡟ከ㔞ࡢሷ໬≀࢖࢜ࣥࡀᏑᅾࡍࡿ࡜㗰ᮦࡀ⭉㣗ࡋࠊࢥࣥࢡ࣮ࣜࢺࡢࡦࡧ๭ࢀࡸ๤ⴠࡢⓎ⏕ࠊ㗰ᮦࡢ᩿㠃ῶᑡ࡞࡝ࡢሷᐖࡀ⏕ࡌࡲࡍࠋሷᐖࡣࠊࢥࣥࢡ࣮ࣜࢺᵓ㐀≀ࡢຎ໬࣓࢝ࢽࢬ࣒ࡢ୰࡛ࡶ≉࡟ຎ໬㏿ᗘࡀ㏿ࡃࠊᵓ㐀≀ࡢᛶ⬟࡬ࡢᙳ㡪ࡣ኱ࡁ࠸ࡇ࡜ࡀ≉ᚩ࡛ࡍࠋࡲࡓࠊࡦࡧ๭ࢀ࡞࡝ࡢኚ≧ࡀ㢧ᅾ໬ࡋࡓᚋ࡟ࠊ☜ᐇ࡞⿵ಟࢆ⾜࠺ࡇ࡜ࡀ㞴ࡋ࠸ࡇ࡜ࡶᣲࡆࡽࢀࡲࡍࠋࡋࡓࡀࡗ࡚ࠊᾏᓊ㏆ࡃ࡞࡝ࠊሷᐖ⎔ቃୗ࡟࠶ࡿࢥࣥࢡ࣮ࣜࢺᵓ㐀≀࡛ࡣࠊᐃᮇⓗ࡟ሷศࡢ౵ධ
≧ἣࢆㄪᰝࡋࠊᚲせ࡟ᛂࡌ࡚ண㜵ಖ඲ⓗ࡞ᑐ⟇ࢆ࡜ࡿࡇ࡜ࡀᮃࡲ
ࡋ࠸࡜ゝ࠼ࡲࡍࠋࡋ࠿ࡋࠊࢥࣥࢡ࣮ࣜࢺ୰ࡢሷ໬≀࢖࢜ࣥ㔞ࢆㄪᰝࡍࡿࡓࡵ࡟ࡣࠊᚑ᮶ࡢ᪉ἲ࡛ࡣࠊࢥ࢔ヨᩱࡢ᥇ྲྀ᫬࡟ෆ㒊ࡢ㗰ᮦࢆയࡘࡅࡿ࠾ࡑࢀࡀ࠶ࡿࡇ࡜ࠊヨ㦂ᐊ࡛ࡢሷศ㔞ࡢ ᐃ࡟᫬㛫ࢆせࡍࡿࡇ࡜࡞࡝࠿ࡽࠊ㧗㢖ᗘ࡟ከᩘࡢ⟠ᡤࢆㄪᰝࡍࡿࡇ࡜ࡣᚲ
ࡎࡋࡶᐜ࡛᫆ࡣ࠶ࡾࡲࡏࢇ࡛ࡋࡓࠋ
ࡑࡇ࡛ࠊiMaRRC ࡛ࡣࠊ≀㉁࣭ᮦᩱ◊✲ᶵᵓ࡜ࡢඹྠ◊✲࡟ࡼࡾࠊሷศࢭࣥࢧ㸦Photograph 1㸧ࢆ⏝࠸࡚ࢥࣥࢡ࣮ࣜࢺ࡬ࡢሷ໬≀࢖࢜ࣥࡢ౵ධ≧ἣࢆ⡆᫆࡟ㄪᰝࡍࡿᢏ⾡ࢆᥦ᱌ࡋࡲࡋࡓࠋࡇࡢᢏ⾡ࡣࠊ⌧ሙ࡛ࡍࡄ࡟⤖ᯝࡀᚓࡽࢀࡿࡇ࡜ࠊ ᐃࡢࡓࡵࡢࢻࣜࣝ๐Ꮝࡀ┤ᚄ 6mm ⛬ᗘ࡛ᵓ㐀≀࡬ࡢᙳ㡪ࡀᑠࡉ࠸ࡇ࡜࡟฼Ⅼࡀ࠶ࡾࡲࡍࠋሷศࢭࣥࢧࡢඛ➃ࢆ ᐃࡋࡓ࠸఩⨨࡟᥋ゐࡉࡏ࡚ࠊᇶ‽㟁ᴟ࡜ࡢ㟁఩ᕪࢆ ᐃࡍࡿࡇ࡜࡛ࠊ◳໬ࢥࣥࢡ࣮ࣜࢺ୰࡟ሷ໬≀࢖࢜ࣥ㔞ࡀከ㔞࡟౵ධࡋ࡚࠸ࡿ࠿࡝࠺࠿ࢆ⌧ᆅ࡛㎿㏿࡟☜ㄆ࡛ࡁࡲࡍ㸦Photograph 2㸧ࠋሷศࢭࣥࢧ࡟ࡼࡿㄪᰝ≧ἣࡢື⏬ࢆ iMaRRC ࣮࣒࣮࣍࣌ࢪ࡟
ᥖ㍕ࡋࡲࡋࡓࡢ࡛ࡈぴࡃࡔࡉ࠸ࠋͤᐇ㦂ື⏬➼ࡢ࣮࣌ࢪ㸦shortvideo㸧http://www.pwri.go.jp/team/imarrc/activity/movie.html
Simple method for measuring chloride ion ingressin concrete structures using chloride sensors
Reinforcements in concrete structures are protectedby a concrete cover. However, when a certain amountof chloride ions penetrate into the concrete cover during
the service life of concrete structures, chloride-induced
corrosion can occur. It is, therefore, important to checkthe amount of chloride ions in a concrete cover tomaintain the concrete structures in severe conditions
like those observed in coastal areas.
However, conventional methods for measuringchloride ions in hardened concrete takes time because
procedures need to be carried out in a test room thatmight damage reinforcements when a core sample istaken using a coring machine.
iMaRRC and National Institute for Materials
Science (NIMS) propose a new simple method tocheck the amount of chloride ions in hardened concreteby using the chloride senor (Photograph 1). Thismethod has advantages in obtaining results on site as
marginal damage is caused to the reinforcements
because the drilling machine for the chloride sensor
needs a sample with a diameter of approximately 6mm. By establishing contact between the edge of thechloride sensor and concrete cover, it can be observed
if a large amount of chloride ions are contained or not(Photograph 2).The video of the measurement by the chloride
sensor is available on the web page of iMaRRC.



Photograph 1: Chloride sensor and reference electrode Photograph 2: Measurement using a chloride sensor ) %$" (' $ +"%&#$) $- 
*"  %'! (' $() )*)                            ,("))' %" #'  ᅵᮌࡢ᪥୍⯡බ㛤 ࢥࣥࢡ࣮ࣜࢺࢆసࢁ࠺㸟   ᅵᮌ◊✲ᡤ࡛ࡣࠊᖹᡂ  ᖺ  ᭶  ᪥㸦ᅵ㸧࡟ᅵᮌࡢ᪥୍⯡Making concrete!

බ㛤ࢆ㛤ദࡋࡲࡋࡓࠋ ࡛ࡣࠊࠕࢥࣥࢡ࣮ࣜࢺࢆసࢁ࠺㸟ࠖࢆ௻⏬ࡋࡲࡋࡓࡢ࡛⤂௓ࡋࡲࡍࠋ

Public Works Research Institute (PWRI) held a㌟㏆࡞ᅵᮌᮦᩱ࡛࠶ࡿࢥࣥࢡ࣮ࣜࢺ࡟ࡘ࠸࡚▱ࡗ࡚ࡶࡽ࠺ࡓ

public open day on November 17, 2018; and iMaRRC

ࡵ࡟ࠊࣔࣝࢱࣝࢆ౑ࡗࡓ࣑ࢽࣉࣛࣥࢱ࣮ࡢᕤసࢆ⾜࠸ࡲࡋࡓheld an exhibition focusing on the theme “Making㸦%)%'& 㸧ࠋ࠶ࡽ࠿ࡌࡵ኱ᑠ஧ࡘࡢ⣬ࢥࢵࣉࢆ⏝ពࡋࠊ኱

concrete.”ࡁ࠸ࢥࢵࣉ࡟ࡣࢭ࣓ࣥࢺ࡜◁ࠊᑠࡉ࠸ࢥࢵࣉ࡟ࡣỈ࡜໬Ꮫΰ࿴๣

To learn about concrete, participants made a miniࢆධࢀ࡚࠾ࡁࡲࡋࡓࠋ኱ࡁ࠸ࢥࢵࣉ࡟Ỉ࡜໬Ꮫΰ࿴๣ࢆὀࡂࠊ๭

planter consisting of mortar (Photograph 3). Usingࡾ⠂࡛⦎ࡾΰࡐ࡚ࡶࡽࡗࡓᚋ࡟ࠊᑠࡉ࠸ࢥࢵࣉࢆࣔࣝࢱࣝ࡟ᢲࡋ

paper cups and chopsticks, the participants mixed㎸ࡴࡇ࡜࡛࣑ࢽࣉࣛࣥࢱ࣮ࢆᡂᙧࡋ࡚ࡶࡽ࠸ࡲࡋࡓࠋ⣬ࢥࢵࣉࡢ

water, cement, sand, and plasticizer; they seemed toᗏ࡟ࢭ࣓ࣥࢺࡸ◁ࡀ೫ࡾࠊ⦎ࡾΰࡐ࡟ⱞᡓࡍࡿ᪉ࡶ࠸ࡽࡗࡋࡷ࠸

enjoy mixing the components. The participants tookࡲࡋࡓࡀࠊࣔࣝࢱࣝࡀΰࡊࡿ㝿ࡢᵝᏊࢆ⯆࿡῝ࡃほᐹࡉࢀࡿ᪉ࡶ

home the mini planter as a souvenir.

ከࡃࠊࣔࣝࢱࣝ〇స࡟ࡘ࠸࡚ᐇ㝿ࡢయ㦂ࡋ࡚㡬ࡃࡇ࡜ࡀ࡛ࡁࡲࡋ

While the mortar was hardening, some quizzesࡓࠋ࣑ࢽࣉࣛࣥࢱ࣮ࡣࠊ⣬ࢥࢵࣉ࡟ධࢀࡓࡲࡲ࠾ᅵ⏘࡜ࡋ࡚࠾ᣢ

about concrete were conducted (Photograph 4).

ࡕᖐࡾ㡬ࡁࡲࡋࡓࡀࠊ⮬Ꮿ࡛ྲྀࡾฟࡋࡓ࣑ࢽࣉࣛࣥࢱ࣮ࡢ௙ୖࡀ

Through the quizzes, the participants learned that thereࡾࡣࠊ࠸࠿ࡀ࡛ࡋࡓ࡛ࡋࡻ࠺࠿ࠋ

are many concrete structures in our surroundings suchࡲࡓࠊࣔࣝࢱࣝࡀ࠶ࡿ⛬ᗘ◳໬ࡍࡿࡲ࡛ࠊ౛࠼ࡤࠊࢭ࣓ࣥࢺࡢ

as roads, bridges, tunnels, and so on.

ཎᩱࡢ୍ࡘ࡛࠶ࡿ▼⅊▼ࡣఱ࠿ࡽ࡛ࡁ࡚࠸ࡿ࠿ࠊࣞࢹ࢕࣑ࢡࢫࢺ

The process of making mini planters was carriedࢥࣥࢡ࣮ࣜࢺࢆ㐠ᦙࡍࡿࢺࣛࢵࢡ࢔ࢪࢸ࣮ࢱࡣ࡝ࢀ࠿ࠊ࡞࡝ࡢࢡ

out five times over the course of the exhibition, and࢖ࢬࢆᴦࡋࢇ࡛ࡶࡽ࠸ࡲࡋࡓ㸦%)%'& 㸧ࠋࢡ࢖ࢬࢆ㏻ࡌ࡚ࠊ

approximately 140 participants including elementary㌟ࡢ࿘ࡾ࡟ࡣࠊከࡃࡢࢥࣥࢡ࣮ࣜࢺࡀ࠶ࡿࡇ࡜ࢆឤࡌ࡚࠸ࡓࡔࡁ

and junior high school students joined us.

ࡲࡋࡓࠋ࣑ࢽࣉࣛࣥࢱ࣮ࡢᕤసࡣྜィ ᅇ⾜࠸ࠊᑠ୰Ꮫ⏕ࢆࡣࡌࡵࠊ⣙140 ྡࡢ᪉ࠎࡀᮏ௻⏬ࢆయ㦂ࡋࡲࡋࡓࠋ

Photograph 3: Mini planter made of mortar

Photograph 4: Conducting quizzes about concrete$" .%*)' "-", $ )! "0"'*+("). #") 2 /'%  *,& "-", $ )-.%./."                       % "1-'"..", *'  " "(", ◊✲⪅⤂௓ iMaRRC Researchersྂ㈡ ⿱ஂDr. Hirohisa Koga joined PWRI in 1997.

ᖹᡂ  ᖺ㸦 ᖺ㸧࡟ᘓタ┬࡟ධ┬ࡋࠊ

Since then he has been working as a researchᅵᮌ◊✲ᡤ࡟㓄ᒓࡉࢀ࡚࠿ࡽࠊ⥅⥆ⓗ࡟

engineer in the concrete division. His researchࢥࣥࢡ࣮ࣜࢺ࡟㛵ࡍࡿ◊✲࡟㛵ࢃࡗ࡚࠸

topics are deterioration mechanisms andࡲࡍࠋࡇࢀࡲ࡛࡟ࠊ୺࡟ࢥࣥࢡ࣮ࣜࢺᵓ㐀

investigation methods of concrete structures.≀ࡢຎ໬࣓࢝ࢽࢬ࣒ࡸࠊࡑࡢⅬ᳨࣭ㄪᰝࡢ

Concrete consists mainly of water, cement,ᡭἲ࡟㛵ࡍࡿ◊✲ࢆ⾜ࡗ࡚ࡁࡲࡋࡓࠋ

sand, and coarse aggregate. While concreteࢥࣥࢡ࣮ࣜࢺ࡟ࡘ࠸࡚ⓙᵝࡣ࡝ࡢࡼ࠺

structures are recognized as a symbol of࡞࢖࣓࣮ࢪࢆ࠾ᣢࡕ࡛ࡋࡻ࠺࠿ࠋࢥࣥࢡ

artificial objects, approximately 70% of࣮ࣜࢺࡣࠊỈ࡜ࢭ࣓ࣥࢺࠊ◁࡜○▼࡞࡝ࢆΰྜࡋ࡚㐀ࡽࢀࡲࡍࠋ࣏ࣆࣗ

concrete consists of sand and coarse aggregate࣮ࣛ㡢ᴦ࡞࡝࡛ࡣࠊேᕤⓗ࡞ࡶࡢࡢ㇟ᚩࡢࡼ࠺࡟⾲⌧ࡉࢀࡿࢥࣥࢡ࣮ࣜ

that have various properties. This variety inࢺ࡛ࡍࡀࠊࡑࡢᮦᩱࡢ⣙㸵๭ࡣኳ↛ࡢ◁ࡸ○▼࡛࡛ࡁ࡚࠸ࡿᆅ⏘ᆅᾘࡢ

primal materials of concrete makes studyingᮦᩱ࡛ࡶ࠶ࡾࡲࡍࠋࡇࡢࡓࡵࠊ㔠ᒓࡸࣉࣛࢫࢳࢵࢡ࡞࡝ࡢᮦᩱ࡜ẚ࡭ࡿ

concrete challenging.

࡜ࠊရ㉁࡟ᆅᇦ࡟ࡼࡿ㐪࠸ࡀ࠶ࡾࠊ㞴ࡋࡃࡶ㠃ⓑ࠸࡜ࡇࢁ࡛ࡍࠋࡲࡓࠊ

Dr. Koga, when he was in his elementaryࢥࣥࢡ࣮ࣜࢺᵓ㐀≀ࡀຎ໬ࡍࡿ࠿࡝࠺࠿࡟ࡣࠊᵓ㐀≀ࡢ⨨࠿ࢀࡓሙᡤࡢ

school, had studied in a RC building that wasẼ㇟స⏝࡞࡝ࡢᙳ㡪ࡀ኱ࡁࡃࠊண᝿ࡀ㞴ࡋ࠸ࡶࡢ࡜࡞ࡗ࡚࠸ࡲࡍࠋ

constructed in 1923 and withstood the blast ⚾ࡀ༞ᴗࡋࡓᑠᏛᰯࡣࠊ኱ṇ  ᖺ㸦 ᖺ㸧࡟஑ᕞึࡢ㕲➽ࢥࣥࢡwave of the Nagasaki atomic bomb. It makes࣮ࣜࢺᰯ⯋ࡀᘓ࡚ࡽࢀࡓ࡜ࡇࢁ࡛ࠊᰯḷࡢ୰࡟ࡶࡑࡢࡇ࡜ࢆព࿡ࡍࡿ

him feel a special relationship with his jobࠕ㕲➽ࠖࡀධࡗ࡚࠸ࡲࡍࠋṧᛕ࡞ࡀࡽࢥࣥࢡ࣮ࣜࢺࡣධࡗ࡚࠸ࡲࡏࢇ

relating to concrete.

ࡀ࣭࣭࣭ࠋࡇࢀ࠿ࡽࡶࢥࣥࢡ࣮ࣜࢺ࡜ࡢ⦕ࢆឤࡌࠊ◊✲ࢆ㏻ࡌ࡚♫఍࡟㈉⊩ࡋ࡚࠸ࡁࡓ࠸࡜ᛮ࠸ࡲࡍࠋᒸᏳ ♸ྖDr. Yuji Okayasu joined iMaRRC as asenior researcher in May 2015.

ᖹᡂ 27 ᖺ 5 ᭶࠿ࡽࠊiMaRRC ࡢᮦᩱ㈨His research interests include investigating※◊✲ࢢ࣮ࣝࣉࡢ୺௵◊✲ဨ࡜ࡋ࡚╔௵the process of recycling of sewage sludge andࡋࡲࡋࡓࠋ

biomass from public works and developing⌧ᅾࡣࠊ୺࡟ࠊ◊✲㛤Ⓨࣉࣟࢪ࢙ࢡࢺ
ࠕୗ

new resource and energy recovery methodsỈ㐨᪋タࢆ᰾࡜ࡋࡓ㈨※࣭࢚ࢿࣝࢠ࣮᭷ຠ

using wastewater for the effective use of฼⏝࡟㛵ࡍࡿ◊✲ࠖ࡟㛵㐃ࡋ࡚ࠊୗỈởἾ

resources/energy focusing on sewer facilities.

ࡸᆅᇦࣂ࢖࣐࢜ࢫࡢ࢚ࢿࣝࢠ࣮฼⏝ࠊୗỈ

Before joining iMaRRC, he worked as a࠿ࡽࡢ㈨※࣭࢚ࢿࣝࢠ࣮ᅇ཰࡞࡝ࡢ◊✲ࢆresearcher for the water quality research team of⾜ࡗ࡚࠸ࡲࡍࠋ╔௵ࡍࡿ௨๓ࡣࠊᅵᮌ◊✲PWRI, an official for the Shiga PrefecturalᡤỈ㉁ࢳ࣮࣒࡛◊✲ᴗົࠊ⁠㈡┴ᗇ࡛ୗỈ㐨஦ᴗࡢᇳ⾜ᴗົࠊ࣋ࢺࢼ࣒♫఍୺⩏ඹ࿴ᅜᘓタ┬࡛ࡣ JICA 㛗ᮇᑓ㛛ᐙ࡜ࡋ࡚ᅜ㝿༠ຊᴗົ࡟ᦠࢃࡗ࡚ࡁࡲࡋࡓࠋᅵᮌ◊✲ᡤ࡛ࡢ◊✲ᴗົࡣ5 ᖺࡪࡾ 2 ᅇ┠࡟࡞ࡾࡲࡍࡀࠊࡇࢀࡲ࡛ࡢ⤒㦂ࢆ⏕࠿ࡋࡘࡘࠊ᪂ࡓ࡞◊✲ㄢ㢟࡟ྲྀࡾ⤌ࡳࠊࡦ࡜ࡘ࡛ࡶከࡃࡢ◊✲ᡂᯝࢆṧࡏࡿࡼ࠺࡟㡹ᙇࡗ࡚࠸ࡁࡓ࠸࡜ᛮ࠸ࡲࡍࠋ

government, and a Japan InternationalCooperation Agency expert for the Vietnamese
government.
He intends to work hard in PWRI and makethe best use of his experiences because hewishes to publish papers to ensure his future in

the research field.$" .%*)' "-", $ )! "0"'*+("). #") 2 /'%  *,& "-", $ )-.%./."                      % "1-'"..", *'  " "(", 
෠ᒣ ⚞ோ 

Dr. Tomonori Tomiyama joined PWRI in ᖹᡂ  ᖺ࡟ᅵᮌ◊✲ᡤ᪂ᮦᩱࢳ࣮࣒

2003. Since then he has been working as a࡟᥇⏝ࡉࢀࠊ௨᮶ࠊᘓタ⏝᪂ᮦᩱ࡜ࡑࡢホ

research engineer in the advanced materials౯᪉ἲ࡟㛵ࡍࡿㄪᰝ࣭◊✲࡟ᚑ஦ࡋ࡚࠸

research division. His present research topicsࡲࡍࠋࡇࢀࡲ࡛ࠊୗỈฎ⌮᪋タࡢ㜵㣗ࣛ࢖

are quality improvement of surface preparationࢽࣥࢢࠊỈ㛛⏝ ࠊ෾⤖㜵Ṇ๣ࠊගࣇfor steel bridge painting, testing methods of࢓࢖ࣂ࣭ࢭࣥࢧࠊ㟁╔ᢏ⾡࡞࡝ࠊẟⰍࡢ␗

post-installed anchors for tunnel jet fans,࡞ࡿᵝࠎ࡞ᮦᩱ࣭ᢏ⾡࡟㛵ࢃࡗ࡚ࡁࡲࡋ

corrosion-resistant linings for sewage treatmentࡓࠋ⌧ᅾࡣࠊ୺࡟㗰ᵓ㐀≀ࡢ⭉㣗࣭㜵㣗ࡸ࠶࡜᪋ᕤ࢔࣮ࣥ࢝ࡢಙ㢗ᛶྥୖ࡟ࡘ࠸࡚◊✲ࡋ࡚࠸ࡲࡍࠋ኱Ꮫ᫬௦ࡣ໬ᏛᕤᏛࢆᑓᨷࡋࠊ໬Ꮫࣉࣛࣥࢺࢆᵓᡂࡍࡿ⿦⨨ᮦᩱࡢタィ࡟ࡘ࠸࡚ᑓ㛛࡟Ꮫࡧࡲࡋࡓࠋᑵ⫋ࢆᶵ࡟ᅵᮌ࡜࠸࠺␗ศ㔝࡬㌟ࢆ⛣ࡍࡇ࡜࡜࡞ࡾࠊᙜ᫬ࡣ୙Ᏻࡶ࠶ࡾࡲࡋࡓࡀࠊᮦᩱࡢຎ໬ᶵᵓࡢゎ᫂ࡸ⪏ஂᛶྥୖ࡟ྥࡅࡓ࢔ࣉ࣮ࣟࢳ࡞࡝ࠊ⪃࠼᪉ࡀඹ㏻ࡋ࡚࠸ࡿ㒊ศࡶከࡃࠊ኱Ꮫ࡛

facilities, and so on. On his days off, he explores
various restaurants and enjoys hiking with hisfamily.Ꮫࢇࡔከࡃࡢࡇ࡜ࡀ⌧ᅾࡢ◊✲࡟ᙺ❧ࡗ࡚࠸ࡿ࡜ᙉࡃឤࡌ࡚࠸ࡲࡍࠋ
 ㊃࿡ࡣṌࡃࡇ࡜࡜ࠊ㣗࡭ࡿࡇ࡜ࠋ⌧ᅾࡣ㣗࡭ࡿࡇ࡜ࡢẚ⋡ࡀ኱ࡁࡃࠊ
ᑠරຊኈ୪࡟⫱ࡗ࡚࠸ࡲࡍࠋ࠿ࡘ࡚௒἞࠿ࡽᑿ㐨ࡲ࡛ࠊࡋࡲ࡞ࡳᾏ㐨ࢆᚐṌ࡛Ώࡗࡓ᫬ࡢឤືࡀᛀࢀࡽࢀࡎࠊ࠸ࡘ࠿ᐙ᪘ࢆ㐃ࢀ࡚ࡶ࠺୍ᗘ
Ṍࡁࡓ࠸࡜⪃࠼࡚࠸ࡲࡍࠋ
ᾏእฟᙇሗ࿌ Business Trip Report
iMaRRC ࡢ㔜ᮧୖᖍ◊✲ဨࡣࠊ࣮࢜ࢫࢺࣜ࢔ࡢ࢘࢕࣮࡛ࣥ㛤ദࡉࢀࡓ ISO/TC275㸦ࠕởἾࡢᅇ཰ࠊ෌⏕฼⏝ࠊฎ⌮ཬࡧᗫᲠࠖ࡟ಀࡿᑓ㛛ጤဨ఍㸧ࡢ➨ ᅇᅜ㝿఍㆟࡟ཧຍࡋࡲࡋࡓࠋᮏ఍㆟ࡣࠊ2018 ᖺ 10 ᭶ 23
᪥(ⅆ)㹼25 ᪥(ᮌ)࡟㛤ദࡉࢀࡲࡋࡓࠋᮏ఍㆟࡟ࡣࠊ᪥ᮏࢆྵࡵ  ࢝ᅜ᪥ᮏࠊ࣮࢜ࢫࢺࣜ࢔ࠊ࣮࢜ࢫࢺࣛࣜ࢔ࠊ࢝ࢼࢲࠊࣇࣛࣥࢫࠊࢻ࢖ࢶࠊ࢖ࢱࣜ࢔ࠊ࢖ࢠࣜࢫࠊࣇ࢕ࣥࣛࣥࢻࠊ୰ᅜࡢཧຍࡀ࠶ࡾࡲࡋࡓࠋ᪥ᮏ࠿ࡽࡣࠊ㔜ᮧ௨እ࡟ࠊẸ㛫௻ᴗࡢ᪉ࡸ᪥ᮏୗỈ㐨஦ᴗᅋࡢ᪉ࡀཧຍࡋࡲࡋࡓࠋ ᮏ఍㆟ࡣࠊ඲యࡢ఍㆟࡜ࠊྛ࣮࣡࢟ࣥࢢࢢ࣮ࣝࣉ㸦㸸⏝ㄒࡢᐃ⩏ࠊ㸸ホ౯᪉ἲࠊ 㸸ᾘ໬ࠊ 㸸ᅵተ㑏ඖࠊ 㸸⇕᧯సࠊ 㸸⃰⦰࡜⬺Ỉࠊ 㸸↓ᶵ≀ཬࡧᰤ㣴ሷ㢮ࡢᅇ཰㸧࡟ศ࠿ࢀࡓ఍ྜࡀ⾜ࢃࢀࡲࡋࡓࠋ ᭶  ᪥࡟ࡣ  ࠊ ᪥༗๓࡟ࡣ  ࠊ᪥༗ᚋ࡟ࡣ  ࡀ㛤ദࡉࢀࡲࡋࡓࠋ ᪥༗๓࡟ࡣ  ࡜  ࡀ୪⾜ࡋ࡚㛤ദࡉࢀࠊ ᪥༗ᚋ࡟⥲఍ࡀ㛤ദࡉࢀࡲࡋࡓࠋ ࡣ  ᖺ࡟タ⨨ࡉࢀࠊࡑࡢᚋࠊྛ࣮࣡࢟ࣥࢢࢢ࣮ࣝࣉࢆ୰ᚰ࡟ࠊࡑࢀࡒࢀࡢᅜ㝿つ᱁᱌ࡸᢏ⾡ሗ࿌᭩᱌࡟ࡘ࠸࡚㆟ㄽࡀ⥆ࡅࡽࢀ࡚࠾ࡾࠊ௒ᅇࡢ࢘࢕࣮ࣥࡢ఍㆟࡛ࡶࠊࡑࡢつ᱁᱌ࡸᢏ⾡ሗ࿌᭩᱌࡟ࡘ࠸࡚ࠊྛᅜ࠿ࡽࡢពぢࢆ㋃ࡲ࠼ࠊ㆟ㄽࡀ⾜ࢃࢀࡲࡋࡓࠋ

Mr. Hiroyuki Shigemura, a chief researcher atiMaRRC, attended the ISO/TC275 (sludge
recovery, recycling, treatment, and disposal) 5th
international conference in Vienna, Austria. The
conference was held from October 23rd to 25th,
2018. Researchers and engineers from ten
countries (Japan, Austria, Australia, Canada,France, Germany, Italy, United Kingdom,Finland, and China) attended the conference. Mr.
Shigemura, engineers of private companies, andemployees of Japan Sewage Works Agency
attended from Japan.
The conference consists of a plenary meeting
and working groups (WG1: terminology, WG2:characterization methods, WG3: digestion,
WG4: land application, WG5: thermal process,
WG6: thickening and dewatering, and WG7:
inorganics and nutrients recovery).
" ,#('% + *"' . %()& ',! '0 -%#(*$ + *"'+,#,-,                           # /+% ,, *(%   & *  ᪥ᮏࡣ≉࡟  ࡜  ࡟✚ᴟⓗ࡟㛵୚ࡋ࡚࠾ࡾࠊࡇࡢ  ࡘࡢ࣮࣡࢟ࣥࢢࢢ࣮ࣝࣉ࡟ࡣᑓ㛛ᐙࢆฟࡋ࡚࠾ࡾࡲࡍࠋ ᮶ᖺࡢ 
WG4 was held on October 23th; WG6,October 24th morning; WG5, October 24thᅜ㝿఍㆟ࡣ୰ᅜ࡛㛤ദࡉࢀࡿணᐃ࡛ࡍࠋ
௒ᚋ࡜ࡶࠊ

afternoon; and WG3 and WG7, October 25thởἾࡢฎ⌮ࡸ෌⏕฼⏝࡟㛵ࡍࡿ᪥ᮏࡢඃࢀࡓ▱ぢࡀ཯ᫎࡉࢀࡿࡼ࠺ࠊmorning. The plenary meeting was held onὀどࢆ⥆ࡅࡿணᐃ࡛ࡍࠋ

October 25th afternoon.

ISO/TC275 was established in 2013. In theworking groups, we continued to discuss eachᖹᡂ  ᖺᗘ 
draft of international standard or draft ofreport. In the Vienna conference, we஺ὶ◊✲ဨࡢເ㞟ࡢࡈ᱌ෆ   technical      discussed them based on comments from each ࡀ஺ὶ◊✲ဨไᗘ㸦ᅜෆࡢ௚ᶵ㛵࡟ᡤᒓࡍࡿ◊✲⪅ࢆᅵᮌ◊✲ᡤ࡟ཷࡅධࢀࡿไᗘ㸧࡟ࡼࡾࠊᖹᡂ  ᖺᗘ࡟ཷࡅධࢀࡿணᐃࡢ◊✲ㄢ㢟ࡀỴࡲࡾࡲࡋࡓࡢ࡛ࠊ⤂௓ࡉࡏ࡚㡬ࡁࡲࡍࠋᖹᡂ country. Japan participates in discussions
conducted in WG5 and WG7 voluntarily, andJapanese experts in both WGs.
Nextyear’s ISO/TC275 internationalᖺᗘࡢཷࡅධࢀㄢ㢟ࡣୗグࡢ  ࡛ࠊᛂເ⪅࡟ࡣࡇࡢ࠺ࡕ୍ࡘࢆ㑅ᢥࡋ࡚㡬ࡁࡲࡍࠋྛ◊✲ㄢ㢟ࡢࡼࡾヲ⣽࡞᝟ሗ࡟ࡘ࠸࡚ࡣࠊ

conference will be held in China. We willࡲ࡛ࡢ࠾ၥ࠸ྜࢃࡏࢆ࠾ᚅࡕࡋ࡚࠾ࡾࡲࡍ㸦ᕳᮎࡢⓎ⾜ඖၥ࠸ྜࢃto reflect on the Japanese superior knowledgeࡏඛࡢ࣓࣮ࣝ࠶ࡿ࠸ࡣ㟁ヰ➼ࢆࡈ฼⏝ୗࡉ࠸ࠋ㸧ࠋࡲࡓࠊཷࡅධࢀࡢ᮲௳➼࡟ࡘ࠸࡚ࡣୗグࡢᅵᮌ◊✲ᡤ࣮࣒࣮࣍࣌

about sludge treatment and recycling.

ࢪࢆࡈཧ↷ୗࡉ࠸ࠋ࡞࠾ࠊເ㞟ࡢ⥾ࡵษࡾࡣᖹᡂ  ᖺ  ᭶  ᪥࡛ࡍࠋ## "%%% %!   '$!&#continue to pay close attention to ISO/TC275



Guidetorecruitment

collaborating

researcher ㄢ㢟ྡୗỈฎ⌮᪋タࡢࢥࣥࢡ࣮ࣜࢺࡢຎ໬࣓࢝ࢽࢬ࣒࠾ࡼࡧ㜵㣗ᮦᩱࡢ⪏ஂᛶホ౯࡟㛵ࡍࡿ◊✲ୗỈヨᩱ࡟㐺ࡋࡓỈ୰⑓ཎᚤ⏕≀ࡢ ᐃ᪉ἲ࠾ࡼࡧᾘẘ᪉ἲ࡟㛵ࡍࡿ◊✲ୗỈฎ⌮ሙ࡟࠾ࡅࡿᇵ㣴⸴㢮ࡲࡓࡣⲡᮌ⣔ࣂ࢖࣐࢜ࢫࡢ᭷ຠ฼⏝࡟㛵ࡍࡿ◊✲࠶࡜᪋ᕤ࢔࣮ࣥ࢝ࡢಙ㢗ᛶྥୖ࡟㛵ࡍࡿ◊✲ࢥࣥࢡ࣮ࣜࢺࡢ⪏ஂᛶホ౯ヨ㦂ᡭἲ࡟㛵ࡍࡿ◊✲ࣉࣞ࢟ࣕࢫࢺࢥࣥࢡ࣮ࣜࢺࡢရ㉁ホ౯ᡭἲ࡟㛵ࡍࡿ◊✲෌⏕㦵ᮦࢥࣥࢡ࣮ࣜࢺ࡟㛵ࡍࡿ◊✲⯒⿦⏝ᮦᩱ࡟㛵ࡍࡿ◊✲⿕そ⣔ࢥࣥࢡ࣮ࣜࢺ⿵ಟ࣭⿵ᙉᮦᩱ࠾ࡼࡧ㜵㣗࡟㛵ࡍࡿ◊✲㗰ᶫ㜵㣗ᢏ⾡࡟㛵ࡍࡿ◊✲ᘓタ⏝᪂ᮦᩱ࡟㛵ࡍࡿ◊✲The research themes for the collaborating
researchers that iMaRRC will accept in thefiscal year 2019 are decided. There are elevenresearch themes for the collaborating
researchers including deterioration mechanismand durability of the materials for sewage
plants, effective use methods of biomass insewage plants, evaluation methods forconcrete, advanced materials for construction,etc.
For more information, please contact
iMaRRC directly. There is also more
information on the homepage of PWRI.

.$*)' !-!,# )  !0!'*+(!). "!)3 /'$ *,&- !-!,# )-.$./.!                          $ !1-'!..!, *'  !!(!,  

ཷ㈹ሗ࿌ Research Awards㈹ཷ㈹⪅ㄽᩥྡ

⾲ᙲᅋయ

ཷ㈹᪥

Award

Recipient Name

Title

Awarding

Dateorganization
ඃ⚽ㄽᩥ㈹(Excellentᮤ ၿኴUF ⭷ࢆ⏝࠸ࡓୗỈ┤᥋ࢁ㐣࡛ࡢ࢘㡑ᅜ⎔ቃᢏ⾡Ꮫ఍Paper Award)(Suntae Lee)࢖ࣝࢫ㝖ཤ

(Korean Society for(Virus Removal by Direct UF Membrane

Environmental

Filtration of Municipal Wastewater)

Technology)ࣂ࢖࣐࢜ࢫ㈨※ࡢ஦ᴗ㛫㐃ᦠά⏝

ᅜᅵ஺㏻┬ ᅜᅵ㹼᳜≀⣔ࣂ࢖࣐࢜ࢫࢆά⏝ࡋࡓୗỈᢏ⾡◊✲఍

(General division, Vitality,ởἾࡢ⬺Ỉᢏ⾡㹼(Kokudogijutsu

Excellent Award)(Joint Utilization of Biomass Resources : akenkyukai, Ministry of

Sewage Sludge Reduction System Using

Land, Infrastructure,Plant-based Biomass)

Transport and(୍⯡㒊㛛 άຊ) ඃ ᒣ㷂 ᗮண(Yukiyo Yamasaki)⚽㈹

2018/10/26

2018/11/2Tourism)➨ 30 ᅇ⎔ቃࢩࢫࢸᒸᏳ ♸ྖ

ᾘ໬ởἾࡢ⬺Ỉศ㞳ᾮࢆ⏝࠸࡚ᇵ㣴⎔ቃࢩࢫࢸ࣒ィ࣒ィ ไᚚᏛ఍◊✲ᒣ㷂 ᗮணࡋࡓ⸴㢮ࡢ⇞ᩱ໬≀࡜ࡋ࡚ࡢ࣏ࢸࣥ

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Ⓨ⾲఍ ዡບ㈹㔜ᮧ ᾈஅࢩࣕࣝ࡟ࡘ࠸࡚

(The Society of(30th EICA Annual(Yuji Okayasu,(Higher heating value of microalgae

Environmental

Meeting Paper Award)

Yukiyo Yamasaki,

obtained by subculture using anaerobic

Instrumentation

Hiroyuki Shigemura)digested sludge filtrate)

Control and2018/11/6Automation)ᅵᮌᏛ఍ᖺḟᏛ⾡ㅮⓒṊ ኊࣔ࢔ࣞ⦤ࢆ฼⏝ࡋࡓࢥࣥࢡ࣮ࣜࢺࡢᅵᮌᏛ఍₇఍ඃ⚽ㅮ₇⪅⾲ᙲ(Tsuyoshi Hyakutake)ࡦࡧ๭ࢀィ ࢩࢫࢸ࣒ࡢ᳨ウ(Japan Society of Civil(JSCE Annual Meeting(Development of crack measurement

Engineering)Excellent Presentation

system using moiré fringe)

2018/12/10Award)

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