## 5 Conclusions  
This experimental study investigates the properties of two foam concrete mixes--blended and general purpose (GP) cement. The blended mix consisted of Portland cement and supplementary cementitious materials, such as fly ash and silica fume, as binders. In contrast, GP cement contained Portland cement only as a binder. PP fibres are used  
Figure 11: Failure modes after compression test (blended mix foam content 60%). Figure 12: Failure modes after compression test (GP mix foam content 59%). in both mixes. Also, the influence of foaming agent types on the properties of the foam concrete mixes was investigated. This study describes the effect of foaming agent types, foam content and supplementary cementitious materials on the density, setting time and compressive strength of the mixes. The key conclusions of this study are as follows:  
* The duration of the mixing of the constituents highly influences the strength and density of the foam concrete. Improper mixing does not yield homogeneous cell structures. Over-mixing destroys some percentage of air bubbles, leading to an increase in the density and a reduction in the volume of the product. * The use of supplementary cementitious materials is becoming increasingly common to meet the sustainability goals of various projects. However, early strength gain was found to be lower for the blended mix. Therefore, if early strength gain is desirable/needed, admixture in the blended mix or GP mix can be used. * Unlike ordinary concrete, the initial setting time of a foam concrete mix may vary from 6 to 7 h and the final setting time may vary between 11 and 22 h. The foam concrete mix prepared with the conventional foaming liquid concentrate was observed to set faster than the same mix prepared with permeable foaming concentrate (used for making permeable foam concrete). This should be noted when foam concrete is selected for a particular application. * Foaming agent types substantially affect the strength and density of foam concrete mix. Irrespective of age and foam concrete mix type, samples prepared with conventional foaming liquid showed significantly higher strength (at least two times) and density than those made of permeable foaming concentrate as a foam concentrate. * A higher percentage of foam content in a foam concrete mix results in the formation of larger-sized air pockets that enhance the thermal insulation and permeability of the product. However, larger air pockets decrease the strength of the product significantly. * PP fibres help slow down the formation of bigger air pockets and contribute to achieving higher strength and ductility of the foam concrete by creating bridges between pores. * The constitutive behaviour of the blended and GP mixes under compression was discussed. While both behave similarly, it is apparent that fibre-reinforced foam concrete behaves differently from fibre-reinforced plain concrete. A long post-peak plateau is observed in fibre-reinforced foam concrete, which is due to the combined effect of multiple crack formation and densification. This study recommends investigating the effects of regional climate conditions on foam concrete mixes and the flexural and shrinkage behaviour of the mixes in a future study. Conceptualisation, M.S., S.K.S. and E.O.G. ; Methodology, S.K.S. ; Software, S.K.S. and M.S. ; Validation, S.K.S. and M.S. ; Formal Analysis, S.K.S. and M.S. ; Investigation, M.S., S.K.S. and E.O.G. ; Resources, M.S. and S.A.-D.; Data Curation, S.K.S. ; Writing--Original Draft Preparation, M.S. and S.K.S. ; Writing--Review and Editing, S.A.-D.; Visualisation, M.S. and S.K.S. ; Supervision, M.S., E.O.G. and S.A.-D.; Project Administration, S.K.S. ; Funding Acquisition, M.S. and E.O.G. All authors have read and agreed to the published version of the manuscript. The authors would like to thank the Australian Federal Government's Innovation Connection Scheme (Grant ID ICG001419) and Eifers Civil Pty Ltd. for providing funding for this project. Not applicable.