矿物掺合料火山灰活性的研究  

Study on the Pozzolanic Activities of Mineral Additives

作　　者：吕鹏[1] 翟建平[1] 李琴[1] 付晓茹[1] 聂荣[1] 

机构地区：[1]南京大学污染控制与资源化研究国家重点实验室,江苏南京210093

出　　处：《建筑材料学报》2005年第3期289-293,共5页Journal of Building Materials

基　　金：国家自然科学基金重点资助项目(59938170);南京大学分析测试基金资助项目

摘　　要：采用强度试验法和酸碱溶出法对原状粉煤灰(FA)、磨细粉煤灰(PFA)、磨细无碱玻璃粉(PNG)和磨细石英粉(PQ)这4种矿物掺合料的火山灰活性进行了对比研究.结果表明:除PQ外,其余3种矿物掺合料火山灰活性的发挥程度均随养护龄期的延长而逐渐增加;4种矿物掺合料的火山灰活性顺序为:PNG>PFA>FA>PQ;在细度相近的情况下,矿物掺合料玻璃体含量高低和钙硅摩尔比大小是决定其火山灰活性的2个重要因素.A study on the pozzolanic activities of four mineral additives including fly ash (FA), pulverized fly ash (PFA), pulverized non-alkali glass powder (PNG) and pulverized quartz (PQ) was carried out with mechanical and alkali-acid dissolve experiments. It is found that the pozzolanic activities of the all powders increase with the prolongation of age except for PQ, the pozzolanic activities of the four powders follow the sequence: PNG > PFA > FA > PQ. The difference of glass contents and the mole ratio of CaO to SiO2 are the two of the main factors affecting the discrepancy of pozzolanic activities of mineral additives when the particle finenesses of the powders are similar.

关 键 词：矿物掺合料 火山灰活性 强度试验法 酸碱溶出法 

分 类 号：X705[环境科学与工程—环境工程] TU528.04[建筑科学—建筑技术科学]