使用聚羧酸类高效减水剂配制C100高性能混凝土的应用研究(英文)

Investigation on the new type of C100 high performance concrete using superplasticizer of polycarboxylic acid

利用新型聚羧酸高效减水剂(n-SPC)制备了C100高性能混凝土.考察了n-SPC对水泥浆流动性和减水效率的影响,测定了C60,C100和混凝土管桩的抗压强度.结果表明,n-SPC只需加入萘系高效减水剂(FDN-5)的1/3就可以达到与FDN-5相同的流动性和坍落度值,C100的7 d抗压强度为95.6 MPa,28 d为119.2MPa;以0.16%n-SPC作为添加剂的混凝土管桩就能获得添加0.65%FDN-5相同的抗压强度,二者分别为103.0 MPa和102.3 MPa.

A new-type superplasticizer of polycarboxylic acid （n-SPC） is used to prepare C100 high performance concrete in this paper. The influences of n-SPC on the fluidity of cement paste and on the efficiency of water reduction are investigated, and the compressive strength is tested for C60, C100 and concrete pipe pile. The results show that in order to get the same fluidity and slump, the addition amount of n-SPC is only one third as much as that of sulfonated naphthalene formaldehyde-type superplasticizer （FDN-5）. The 7-day compressive strength for C100 is 95.6 MPa, while the 28-day compressive strength is 119.2 Mpa. The same compressive strength could be reached for concrete pipe pile with 0.16 % n-SPC and for that with 0.65 % FDN-5, which are 103.0MPa and 102.3MPa respectively.