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Air pores in foam concrete

Moreover, the content, shape, structure, and distribution of air pores in foam concrete mainly relied on the properties of prefabricated foams, cement pastes, and the interaction between foams and cement pastes. Previously, most of the research focused on improving the cement matrix in foam concrete to increase the stability of fresh foam concrete and optimize the air pore structures. Some scholars have also studied the influence of foaming agents on the properties of foamed concrete. D.K. Panesar and C. Sun found that the foaming agent affects the pore size, pore size distribution, and pore connectivity of foam concrete, which leads to the difference in strength, water absorption, and frost resistance of foam concrete. Neil found that cement paste yield stress affected the stability of cement foams, and surfactants affected the yield stress of cement paste. The foaming agent used in the preparation of foam concrete had an important influence on the foam concrete properties (density, fluidity, stability, pore structure, etc.). The interaction between foaming agents and cement plays a more significant role in forming foam concrete. And the property of the gas-liquid interface of foam concrete is the most critical factor for the performance of foam concrete. However, the preparation of low-density foam concrete still needs to be challenged. The increase in the proportion of foam volume often leads to poor stability of fresh foam concrete paste and connectivity porosity of hardened foam concrete. These are mainly attributed to the evolution issues of foam in the new foam concrete paste. These are mainly attributed to the evolution of foam in the fresh foam concrete paste, that is, how the prefabricated foams react with the cement paste. This work explores the formation of pore structures in hardened foam concrete from the interfacial reaction between the foaming agent and cement paste. Therefore, four types of surfactants (anionic surfactant, cationic surfactant, non-ionic surfactant, and amphoteric surfactant) were used as foaming agents to prepare foam concrete. The interaction between foaming agent and cement paste and its effect on the formation of pore structure of foam concrete was studied. If you are looking for high quality, high purity and cost-effective Foaming agent, or if you require the latest price of Foaming agent, please feel free to email contact mis-asia.

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