摘要
Abstract
To address the degradation of workability,mechanical properties,and durability in manufactured sand concrete caused by flocculant residues in wet sand production processes,this study conducted compatibility research using manufactured sand with varying residual polyacrylamide(PAM)and polyaluminum chloride(PAC)content as fine aggregates,along with a long-chain super-sagging mother liquor-type polycarboxylate superplasticizer produced by a manufacturer,as exemplified by the Quanzhou Yangjiang Water Purification Enhancement Project.Results demonstrated that when the PAM residue in manufactured sand was 0.5‰,increasing the dosage of the long-chain super-sagging mother liquor-type polycarboxylate superplasticizer from 1.0％to 1.25％,combined with 1.0‰ cetyltrimethylammonium chloride and 1.5‰ polyethylene glycol,while raising the sand ratio from 38％to 41％,the initial slump of concrete could recover from 170 mm to 200 mm,with 1-hour slump loss reduced to 30 mm.The 28-day compressive strength reached 38.5 MPa,achieving P8 water resistance and F200 frost resistance,meeting engineering requirements.This study provides an additive compatibility technical solution for concrete applications involving manufactured sand with flocculant residues.关键词
机制砂/絮凝剂残留/混凝土外加剂/长支链超保坍母液Key words
Mechanism sand/Flocculant residue/Concrete admixture/Long-chain super-sagging mother liquor分类
建筑与水利
