多孔木屑混凝土的制备及其清水浸泡对水质的影响  

Preparation and Clear Water Immersion Test of Porous Sawdust Concrete

作　　者：徐大勇[1] 蔡昌凤[1] 徐建平[1] 廖斌[2] 刘小磊[1] 王强[1] 

机构地区：[1]安徽工程大学生物与化学工程学院,安徽芜湖241000 [2]安徽工程大学建筑工程学院,安徽芜湖241000

出　　处：《重庆理工大学学报（自然科学）》2013年第11期42-46,共5页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51274001);中国矿业大学煤炭资源和开采国家重点实验室开放基金项目(SKLCRSM10KFA05);芜湖市科技计划项目(2013cxy13)

摘　　要：为进一步提高多孔混凝土(PC)的性能和降低废水处理成本,制备了多孔木屑混凝土(PSC)。通过清水浸泡和浸泡液的种子发芽试验,考察了PSC浸泡后孔隙率变化及其浸泡过程对水质的影响。结果表明:木屑含量及其水灰比对PSC的抗压强度和孔隙率均有较大影响。木屑含量从0%增加8%时,PSC孔隙率从12.9%上升到23.8%,抗压强度则从3.14 MPa下降到0.25 MPa。水灰比从0.45增加到0.65时,PSC抗压强度从0.12 MPa增加到1.97 MPa,而孔隙率呈线性下降,从29.7%下降到15.9%。PSC清水浸泡时,其浸泡液的pH值、EC和COD分别为9.5、3.5 mS/cm和160.9 mg/L。PSC浸泡后孔隙率平均下降幅度小于3.0%。种子发芽试验表明,PSC浸泡液对青菜种子发芽率无明显阻碍作用。To further enhance PC performance and reduce the cost of wastewater treatment, the porous sawdust concrete （PSC） was prepared. And with the clear water immersion test and germination ex-periment, the PSC porosity change and the influence on water environment were investigated in this paper. The results show that both of the sawdust content and water-cement ration have important influ-ence on the compressive strength and the porosity of PSC. When content of sawdust increased from 0% to 8%, the porosity of PSC increased from 12.9% to 23.8% , and the compressive strength de-creased from 3.14 MPa to 0.25 MPa. When water-cement ratio increased from 0.45 to 0.65, PSC compressive strength increased from 0.12MPa to 1.97 MPa, but at the same time, PSC porosity de-creased linearly that decreased from 29.7% to 15.9%. When PSC immersed into the clear water, the pH, EC and COD value of soaking water were of 9.5, 3.5mS · cm^-1 and 160.9 mg · L^-1, respec-tively. And the pH and EC value decreased with the increasing of sawdust. After immersion test, the porosity of PSC was decreased less than 3.0%, and much less than 6.5% of PC. The germination tests results show that the PSC soaking water does not significantly impede the vegetables seed germi-nation rate.

关 键 词：多孔混凝土 木屑 浸泡试验 种子发芽试验 水质影响 

分 类 号：TU528[建筑科学—建筑技术科学] X703[环境科学与工程—环境工程]