PCCP保护层砂浆性能影响因素的试验研究  

Experimental Study on the Influencing Factors of the Properties of PCCP Protective-layer Mortar

作　　者：王浩 杨亚彬[2,3] 王坤 吕艺生 尚鹏然[2,4] 李风兰 WANG Hao;YANG Yabin;WANG Kun;LYU Yisheng;SHANG Pengran;LI Fenglan(Henan Fuchen Pipe Co.,Ltd.,Xinxiang 453400,China;Collaborative Innovation Center for Efficient Utilization of Water Resources in Yellow River Basin,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;School of Civil Engineering and Communications,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;International Joint Research Lab for Eco-building Materials and Engineering of Henan,North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]河南省富臣管业有限公司,河南新乡453400 [2]华北水利水电大学黄河流域水资源高效利用省部共建协同创新中心,河南郑州450046 [3]华北水利水电大学土木与交通学院,河南郑州450045 [4]华北水利水电大学河南省生态建材工程国际联合实验室,河南郑州450045

出　　处：《华北水利水电大学学报（自然科学版）》2022年第5期24-30,共7页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家自然科学基金项目(52108212);河南省重点研发与推广专项项目(202102310250);河南省自然科学基金项目(212300410192);国家重点建设引江济淮(河南段)管材采购4标科研项目(FCGY/JC2020/001)。

摘　　要：PCCP保护层砂浆辊射成型质量受多种因素的影响,是PCCP生产质量控制的难点之一。考虑辊射系统参数、辊射轮状态、辊射距离、砂灰比及新拌砂浆含水率等因素,进行了PCCP保护层砂浆的工作性能和力学性能试验研究。结果表明:辊射系统整体运行速度为中高速条件下,所成型的砂浆强度、吸水率以及保护层厚度可达到最优;辊射轮外缘相切、辊射距离为40 cm时,砂浆强度、吸水率以及回弹率最佳;砂浆抗压强度随着砂灰比的降低而逐渐增大,但吸水率随砂灰比的降低呈现先降低后升高的现象。当砂灰比为2.4时,PCCP保护层砂浆的吸水率最小;当砂灰比不变时,新拌砂浆含水率越大,砂浆试块的抗压强度越高,其吸水率越低。Due to affected by multi-factors,the roller-shooting forming quality of PCCP protective-layer mortar is one of the difficulties of PCCP production quality control.In this paper,the working performance and mechanical properties of PCCP protective-layer mortar were experimentally studied by considering the roller shooting system parameters,the roller shooting wheel state,the shooting distance,the ratio of mortar to cement ratio(by mass)and the water content of fresh mortar.Results show that the mortar strength,water absorption and protective-layer thickness could reach the best under the conditions that the overall running speed of the roller shooting system was the medium to high range.When the outer edge of the roller was tangent with the shooting distance of 40 cm,the mortar was formed with a best strength,water absorption rate and rebound rate.The mortar compressive strength increased gradually with the decrease of the sand-cement ratio,but the water absorption rate decreased first and then increased.The water absorption rate was the lowest when the sand-cement ratio was 2.4.When the sand-cement ratio was constant,the fresh mortar with higher water content leads a higher compressive strength and a lower water absorption of hardened specimens.

关 键 词：PCCP 保护层砂浆 抗压强度 吸水率 含水率 砂灰比 

分 类 号：TV432[水利工程—水工结构工程]