Preparation of Ready Mixed Cast-in-place Foam Concrete and its Properties

Through the transportation of precast slurry to site and in-situ foaming and mixing, the ready mixed cast-in-place foam concrete was prepared. The compressive strength, water absorption and thermal conductivity of ready mixed cast-in-place foam concrete under different water cement mass ratios and foaming times were tested and studied. The optimum component of cast-in-place foam concrete and the influence of mineral admixtures on the properties of the cast-in-place foam concrete were discussed. The results show that when the mass ratio of water cement is 0.35 and the foaming time is 3 min, the compressive strength of ready mixed cast-in-place foam concrete is the highest, but the foaming time is 4 min, and its thermal conductivity is the lowest. When the steel slag powder and fly ash mix amount is respectively 20% (mass fraction), the performance of cast-in-place foam concrete is the best, and the performance of adding pulverized coal fly ash is better than that of not adding pulverized coal ash.