Investigation of Effect of Proposed Two-Stage Foam Injection Method and Modified Additive on Workability of Foam Concrete
Lukpanov R. Dyussembinov D. Altynbekova A. Yenkebayev S. Zhumagulova A.
May 2024Multidisciplinary Digital Publishing Institute (MDPI)
Materials
2024#17Issue 9
This article presents the results of an investigation of the proposed method and the influence of a modified additive on foam concrete properties. X-ray diffraction analysis showed that the modified additive has a variable mineralogical composition, and the joint use of the components contributes to the synergistic effect, improving the processes of cement hydration. Microscopy of the foam concrete samples showed the presence of microcracks and micropores in samples both with and without the additive. However, the use of the additive significantly reduced their number and size, which indicates an improvement in the structure of the material. The strength values showed that the samples with the additive have high strength. In particular, the strength values of samples of type 3 at different stages of curing exceed those of samples of type 1 by 1.32–1.51 times and samples of type 2 by 1.07–1.10 times. The obtained strength values are 2.82–3.21 MPa for type 1, 3.64–4.04 MPa for type 2, and 4.39–4.84 MPa for type 3, which corresponds to grade D600. The evaluation of water absorption also confirmed the advantages of the proposed method and the additive, significantly reducing the water absorption of the samples and increasing their hydrophobicity. The obtained values of water absorption are 13.8–16.6% for type 1, 13.7–16.1% for type 2, and 9.5–11.2% for type 3.
blowing agent , compressive strength , foam concrete , microscopic analysis , microsilica , post-alcohol bard , water absorption , X-ray diffraction analysis
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Solid Research Group, LLP, Astana, 010008, Kazakhstan
Department of Technology of Industrial and Civil Engineering, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Department of Construction, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Solid Research Group
Department of Technology of Industrial and Civil Engineering
Department of Construction
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