Abstract: Based on the central composite experimental method of response surface methodology, the alkali activated slag-limestone powder cement mortar was prepared by choosing alkali content and limestone powder content as variables, and the mechanical strength of different age was studied. The response surface of relation between each variable and the flexural, compressive strength was obtained through data processing. And the effects of various variables on strength of alkali activated slag-limestone powder cement mortar were analyzed. The response surface model of strength was established, and it can serve as a scientific method for predicting the strength of mortar at different ages in the field. The optimized results showed that when the Na2O content is 8.27% and limestone powder content is 14.02%, the components can exert synergistic effect and ensure good mechanical properties. Therefore, the response surface methodology is an effective optimization method for alkali activated cement mortar.
1 Purdon A O. The action of alkalis on blast-furnace slag[J].J Soc Chem Ind, 1940,59:191. 2 Rostami M, Behfarnia K. The effect of silica fume on durability of alkali activated slag concrete[J]. Constr Build Mater, 2017,134:262. 3 Serdar Aydn. A ternary optimisation of mineral additives of alkali activated cement mortars[J]. Constr Build Mater, 2013,43(3):131. 4 Lee N K, Lee H K. Setting and mechanical properties of alkali-activated fly ash/slag concrete manufactured at room temperature[J]. Constr Build Mater, 2013,47(5):1201. 5 Luo Xin, Xu Jinyu, Bai Erlei, et al. Systematic study on the basic characteristics of alkali-activated slag-fly ash cementitious material system[J]. Constr Build Mater, 2012,29:482. 6 Vlcˇek V, Tomkova V, Babkova P, et al. Alkali-activated composites based on slags from iron and steel metallurgy[J]. Metalurgija, 2009,48(4):223. 7 Zhang Lanfang. Study on performance of alkali-activated waste residue (AAW) concrete[D]. Chongqing: Chongqing University, 2006(in Chinese). 张兰芳. 复合渣体(AAW)混凝土的性能研究[D]. 重庆:重庆大学, 2006. 8 Provis J L, Palomo A, Shi C. Advances in understanding alkali-activated materials[J]. Cem Concr Res, 2015,78:110. 9 Ding Yao, Dai Jianguo, Shi Caijun. Mechanical properties of alkali-activated concrete: A state-of-the-art review[J]. Constr Build Mater, 2016,127:689. 10Gao Yuan, Xu Jinyu, Zhang Guoxi, et al. Response surface on early performance of alkali-activated slag binder[J]. J Build Mater, 2016,19(2):209(in Chinese). 高原,许金余,张国喜,等.矿渣碱激发胶凝材料早期性能的响应曲面研究[J].建筑材料学报,2016,19(2):209. 11Kang Suk-Pyo, Kwon Seung-Jun. Effects of red mud and alkali-activated slag cement on efflorescence in cement mortar[J]. Constr Build Mater, 2017,133:459. 12Atis C D, Bilim C, elik , et al. Influence of activator on the strength and drying shrinkage of alkali-activated slag mortar[J]. Constr Build Mater, 2009,23(1):548. 13Zhang Lanfang, Zhang Yong, Cao Sheng. Study on properties of alkali-activated slag-limestone powder mortar[J]. China Concr Cem Products, 2016(11):6(in Chinese). 张兰芳,张永,曹胜.碱激发矿渣-石灰石粉砂浆的性能研究[J].混凝土与水泥制品,2016(11):6. 14徐向宏,何明珠.试验设计与Design-Expert、SPSS应用[M]. 北京: 科学出版社,2010. 15Niyazi Ugur Kockal, Turan Ozturan. Optimization of properties of fly ash aggregates for high-strength lightweight concrete production[J]. Mater Des, 2011,32:3586.
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2017, Vol. 31 
