预拌混凝土浆水综合利用试验研究  

Experimental study on comprehensive utilization of ready-mixed concrete slurry water

作　　者：彭丙杰 黄小川 蒲诗杰 陈小辉 肖世玉 PENG Bingjie;HUANG Xiaochuan;PU Shijie;CHEN Xiaohui;XIAO Shiyu(Chengdu Jiangong Seller Concrete Co.Ltd.,Chengdu 610015,China)

机构地区：[1]成都建工赛利混凝土有限公司,四川成都610015

出　　处：《新型建筑材料》2023年第11期64-69,92,共7页New Building Materials

基　　金：四川省科技重点研发项目(2021YFG0272)。

摘　　要：为了有效、合理地利用预拌混凝土企业浆水,通过研究浆水的基本性质和对混凝土工作性、强度、耐久性的影响,提出了浆水的综合利用措施,并建立了浆水密度与浓度的关系,可快速判定浆水的浓度,及时指导生产。试验表明,浆水对安定性影响较小,但对凝结时间和标准稠度用水量影响较大,且浆水会使混凝土浆体黏度增大,影响流速。浆水浓度≤9%时,通过调整外加剂掺量和用水量达到与基准组工作性相当后,对C30混凝土强度、回弹强度和碳化影响不大,且强度发展规律与基准组相当。保持浆水全部等效为自来水,其固含量也作为自来水的一部分,在浓度为9%时,混凝土电通量和平板开裂试验的整体开裂面积与基准组相当,但混凝土首条裂缝开裂时间和裂缝快速发展时间均较基准组提前。In order to make effective and rational use of waste slurry water in ready-mixed concrete enterprises,this paper puts forward the comprehensive utilization measures of slurry water through studying the basic properties of slurry water and its basic properties on the workability,strength and durability of concrete,and establishes the relationship between the density and concentration of slurry water,which can quickly determine the concentration of slurry water and timely guide the production.The results show that the slurry water has little influence on stability,but has great influence on setting time and water consumption of standard consistency.In addition,slurry water will promote the viscosity of concrete slurry increase,and affect the flow rate.In addition,when the slurry water concentration is≤9%,it has little influence on the strength,rebound strength and carbonization of C30 concrete after reaching the standard workability through admixtures and water consumption,and the strength development law is similar to the standard.Keep the slurry water all equivalent to tap water,its solid content is also as part of tap water,concrete electric flux and monolithic slab concrete cracking are similar to the benchmark at a concentration of 9%,but the cracking time of the first concrete crack and the rapid development time of the crack are earlier than the benchmark.

关 键 词：浆水 浓度 扩展度 强度 碳化 

分 类 号：TU528[建筑科学—建筑技术科学]