As the third generation of new type concrete water reducing agent, polycarboxylic acid superplasticizer is generally considered to represent the development trend of the concrete reduction agent for its low dosage, high water reducing rate, high slump, low shrinkage and environmental friendly. The former two generations of water reducing agent can not match this performance advantage.
Polycarboxylate high performance water reducing agent is a macromolecular compound with carboxyl, amino, Sulfonic acid group and containing polyoxyethylene side chain, in aqueous solution, through free radical copolymerization principle synthesis with polymer surfactant comb type structure. The main raw materials of synthesis of polycarboxylate high performance water reducing are methacrylic acid, acrylic acid, ethyl acrylate, sodium allyl sulfonate acid, methyl methacrylate, 2- acrylamide - 2- methoxy acrylate，methoxy polyoxyethylene methyl acrylate and ethoxy polyethylene glycol acrylate, allyl ether etc.
Polycarboxylic concrete water reducing agent is the third generation high performance water reducing agent. Compared with the traditional water reducer, it has the following prominent advantages:
A. high water reduction rate: carboxylic acid high performance water reducing rate can reach 25-40%.
B. high strength growth rate: very high strength of growth rate, especially the early strength of high growth rate.
C. excellent slump: excellent slump performance can guarantee the minimum loss of concrete.
D. good uniformity: the concrete has a very good fluidity and easy to cast and compacted, it is suitable for self leveling and self compacting concrete.
E. wide adaptability: material for concrete has good dispersibility and plasticity of pure silicon, silicon, Pu slag Portland cement and admixture.
F. production controllability: through the polymer molecular weight, the length of the side chain density and side chain groups to adjust the adjustment of the types of the series water reducing agent, water reducing rate, water and air entraining performance.
G. low shrinkage: it can effectively improve the volume stability of concrete.
H. green environmentally: non-toxic, non corrosive, non formaldehyde and other harmful components.
Polycarboxylic acid superplasticizer can be applied to high-speed rail, passenger, industrial and civil buildings, roads, bridges, ports, airports and other projects of the precast and cast-concrete, reinforced concrete and prestressed concrete. It especially suitable for long time preparation of concrete construction, high requirements the projects of slump of concrete, such as nuclear power engineering. OKCHEM blog updates knowledge and information about chemicals and precise datas of China chemicals, if you have interest, please follow us linkedin page or visit our homepage.