木质素磺酸盐减水剂用于预拌混凝土中的经济性研究

Economy of ligno-sulfate based plasticizer in ready-mixed concrete

通过试验对木质素磺酸盐减水剂(LS)、以LS为主配制的泵送剂(MB)以及以萘系高效减水剂(NSF)为主配制的泵送剂(NB)在矿渣粉掺量20%、粉煤灰掺量10%的C15～C40预拌混凝土中的技术、经济性进行了对比。结果表明,在原材料通常价格情况下,对于C30及C30以下的混凝土,采用泵送剂MB,其技术和经济性均最佳。在NSF原材料日益短缺导致NSF售价较高的情况下,实际工程中不得忽视LS这种利废、环保且经济性较佳的产品。

The properties and economy of application of 3 admixtures, i.e.lingo-sulfate based plasticizer（LS ）, pumping agent MB mainly con raining LS, and pumping agent NB mainly containing naphthalene-sulphonate based superplasticizer （NSF）, were experimentally investigated.The results indicate that the best properties and the best economy can be obtained when MB is added in ready-mixed concrete of Cl5 to C40 with the replacement by slag powder at 20% and by fly ash at 10%.It is proposed that LS should be taken seriously in application of ready-mixed concrete esneciallv when NSF is of high nrice led by the lack of NSF＇s raw materials.