Preparation And Properties Of Lightweight Foam Concrete In Cold Regions

The internal porous structure which is inside the foam concrete has the character oflightweight, heat, noise, seismic, etc., and lightweight foam concrete which are widelyused in energy-saving insulation wall. And the application of more specific lightweightfoam concrete, insulation and as a filler material in the construction of the main castmolding. With the current vigorously implement energy saving policies, application offoam concrete is also more widespread, various problems have cropped up increasinglyprominent, including applications in cold regions have great difficulty.This paper studied in lightweight foam concrete, aimed at its application in coldregions perspective, by specific test methods and testing, trying to use foam concreteenergy efficiency and insulation construction site pouring cold regions providereferences. Technology through a variety of methods for the preparation andperformance of foam concrete were improved.This paper firstly test the common market through the nine different types ofblowing agents in foam properties and foam stability under different temperatureconditions, and the test results were analyzed to determine the temperature of theblowing agent for foam concrete performance. Meanwhile optimized for the preparationof20-fold dilution of the two plants and complex type foaming agent lightweight foamconcrete.By forming lightweight concrete circumstances of its parameters can be adjustedwith the ratio, draw a suitable molding paste fluidity, water-cement ratio,superplasticizer, admixture, and coagulant dosage, etc., while studying these factorsinfluence of foam concrete preparation. And for forming patterns and problems at lowtemperature and light foam concrete, to find the cause and resolve to achieve goodstability and light can be obtained at lower temperatures foam concrete. The resultsshow that at lower temperatures and little effect change blowing agent, the mainproblem is that the cement hydration and hardening time is increased, resulting incollapse of the bubble is not stable specimen. Incorporation of coagulant and celluloseethers to improve the effect of forming a low temperature to some extent, meet therequirements.Through experimental research on the different properties of foam concrete,determining factors and the influence of foam concrete and practical performance.There are thermal conductivity, porosity, water absorption, frost resistance and porestructure, analyze the relationship and differences between them, and the method canimprove the performance of the proposed theory, and improve its feasibility and thedegree of difficulty and effect of experimental research, to finalize the preparation and application of lightweight foam concrete and feasible measures to improve performance.Thermal conductivity test preparation253kg/m3foam concrete in0.063W/(m K),lower than the expected0.06W/(m K) has a tiny gap.