Experimental Study On Preparation Of Foam Concrete Making Use Of Waste Clay Brick

The development of building trade of our country advances by leaps and bounds, moreand more brick masonry buildings are stead of new buildings. A lot of waste brick hasbecome construction waste. It is viable to get recycled aggregate and recycled cementitiousmaterial by sorting and breaking, and grounding brick into powder. Under the actionof the activators, brick powder can be activation, it can be used as wall materials like foamconcrete blocks.The post has taken a great deal of research on the brick powder properties of foamconcrete, in the light of main factors which is affecting foam agent system, cementitiousmaterial system, composition system, and additive agent of foam concrete. Though thesingle factor experiment and orthogonal experiments. The experimental data including brickpowder foam concrete surface dry density, compressive strength of28d cubes, waterabsorption, freeze-thaw index and carbonization index.Conclusions: Select LAS as the foaming agent, dilution ratio is1:50, select0.12%HPMC as foam stabilizer, the foam properties meet the requirements which can be used inthe waste bricks in foam concrete. Activator can effectively stimulate the active ingredient inbrick powder, when gypsum is15%and lime is20%, the foam concrete has the bestmechanical properties; Polycarboxylate super plasticizer and brick powder foamconcrete has good adaptability, when it is content of0.9%~1.5%, the brick powder foamconcrete workability is compatible; cementitious material system is the main factor affectingthe brick powder foam concrete mechanical properties and water absorption rate. Whenthe brick powder mixing amount is70:10:20, the compressive strength is5.5MPa, it evencan improve the concrete water absorption, durability. Considering the maximum use ofengineering waste, using cement brick powder and fly ash as the composition of60:20:20,the compressive strength is greater than4.0MPa; Waste clay brick crushing screening morethan4.75mm particles, it can be recycled as brick aggregate, the incorporation of brick powder foam concrete can greatly improve its durability, expand application range of brickpowder foam concrete, foam concrete brick meet the industry standard of FCA10-C2-W20-JG/T266-2011, it can save cement147kg/m3and dinas223.3kg/m3.Based on the data analysis, FC A06-C4-W25-JC/T266-2011of foam concrete brickindustry standard can be produced. Table dry density is635.1kg/m3, compressive strength of28d is4.6MPa, bibulous rate is24.0%, mass loss and strength loss is3%after freezing andthawing, carbonation coefficient is0.87, Coefficient of thermal conductivity is0.127, thebrick powder foam concrete meet the requirement of A3.5in GB0574-2010wall materialsspecification, it can be used as exterior wall thermal insulation filling wall and framestructure, it can save cement100kg/m3. It is not only to meet the requirements of energysaving and utilizing industrial waste, but also has prominent economic benefit and socialeconomic benefit, it’s pregnant for accelerating social development of resource saving andenvironment friendly.