Properties of Man-made Silicate Aggregate and the Lightweight Concrete
YANG Xiuli1, CUI Chong1, CUI Xiaoyu1, JIA Jianping2, ZHU Zhiping2
1. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. Zhenjiang Wall Material Innovation & Energy Saving in Buildings Office, Zhenjiang 212001, China
摘要利用固体废弃物研制了一种高性能的人造硅酸盐骨料，期望可以取代天然骨料用于混凝土制备。采用水热合成的方法，将工业固体废弃物制备成堆积密度为859 kg/m3，筒压强度最高达20.65 MPa 的人造硅酸盐骨料。将人造硅酸盐骨料作为粗骨料配制混凝土，混凝土的28 d 抗压强度为52.26~68.71 MPa，表观密度为1881~1949 kg/m3。在基体相同的情况下，将人造硅酸盐骨料与普通石子进行等体积替换，配制的混凝土的28 d 抗压强度相当，但人造硅酸盐骨料混凝土的表观密度比普通混凝土降低约20.5%，具有轻质高强的特点，能够达到结构混凝土的要求。从混凝土的破坏形态看，人造硅酸盐骨料与基体的界面结构比天然骨料好，界面强度高，无界面剥落的情况发生。
Abstract：High-performance man-made silicate aggregate was prepared with hydrothermal method by using industrial solid wastes, which can be used to replace natural aggregate. The obtained silicate aggregate was spherical with the bulk density of 859 kg/m3 and the maximum cylinder compressive strength of 20.65 MPa. The concrete was prepared using the silicate aggregate, accounting for 50% of the total amount in volume. The compressive strength of the concrete reached 52.26-68.71 MPa, and the apparent density was 1881-1949 kg/m3. Comparison of the concrete with silicate aggregate and common concrete with the same volume of aggregate and cement mortar shows that the compressive strengths of the two kinds of concrete were close, but the density of the former was 20% lower than that of the latter. The fracture morphology of the concrete shows that the interface structure of the silicate aggregate concrete is better than that of common concrete.
[1] 胡曙光, 何永佳. 利用废弃混凝土制备再生胶凝材料[J]. 硅酸盐学报, 2007, 35(5): 593-599. Hu Shuguang, He Yongjia. Preparation of regenerated binding material using waste concrete[J]. Journal of the Chinese Ceramic Society, 2007, 35(5): 593-599.
[2] 郑强. 废弃混凝土再生利用的研究进展[J]. 商品混凝土, 2009, 6: 24-26. Zheng Qiang. The research development of reutilization of waste concrete[J]. Beton Chinese Edition—Ready-mixed Concrete, 2009, 6: 24-26.
[3] 刘昕, 张雄, 李雯霞, 等. 国内外再生粗骨料研究新进展[J]. 建筑技 术, 2010, 41(1): 63-66. Liu Xin, Zhang Xiong, Li Wenxia, et al. Latest progress on recycled aggregate[J]. Architecture Technology, 2010, 41(1): 63-66.
[4] 王志威. 高品质再生骨料的生产工艺[J]. 混凝土, 2006, 9: 48-50. Wang Zhiwei. Recycling technology for high quality recycled aggregate[J]. Concrete, 2006, 9: 48-50.
[5] 孙增昌, 王汝恒, 古松. 再生骨料混凝土增强技术研究现状分析[J]. 混 凝土, 2010, 2: 57-60. Sun Zengchang, Wang Ruheng, Gu Song. Present situation of recycled aggregate concrete enhancement-technology research[J]. Concrete, 2010, 2: 57-60.
[6] 肖开涛. 再生混凝土的性能及其改性研究[D]. 武汉: 武汉理工大学, 2004. Xiao Kaitao. Study on the properties and the modification of recycled concrete[D]. Wuhan: Wuhan University of Technology, 2004.
[7] Ravindrarajah R, Tam C T. Properties of concrete as coarse aggregate[J]. Magazine of Concrete Research, 1985, 37(130): 29-38.
[8] 肖建庄, 李佳彬, 孙振平, 等. 再生混凝土的抗压强度研究[J]. 同济大 学学报: 自然科学版, 2004, 32(12): 1558-1561. Xiao Jianzhuang, Li Jiabin, Sun Zhenping, et al. Study on compressive strength of recycled aggregate concrete[J]. Journal of Tongji University: Natural Science Edition, 2004, 32(12): 1558-1561.
[9] 肖建庄, 兰阳. 再生混凝土单轴受拉性能试验研究[J]. 建筑材料学报, 2006, 9(2): 154-158. Xiao Jianzhuang, Lan Yang. Investigation on the tensile behavior of recycled aggregate concrete[J]. Journal of Building Materials, 2006, 9 (2): 154-158.
[10] 杨曦, 吴瑾, 梁继光. 再生混凝土抗拉强度与抗压强度关系的试验研 究[J]. 四川建筑科学研究, 2009, 35(5): 190-192. Yang Xi, Wu Jin, Liang Jiguang. Experimental study on relationship between tensile strength and compressive strength of recycled aggregate concrete[J]. Sichuan Building Science, 2009, 35(5): 190-192.
[11] 李婷. 再生骨料缺陷对再生混凝土力学性能影响的研究[D]. 北京: 北京交通大学, 2013. Li Ting. Influence of defects in recycled aggregate on mechanical properties of recycled aggregate concrete[D]. Beijing: Beijing Jiaotong University, 2013.
[12] 王竞妍. 再生骨料缺陷对再生混凝土耐久性的影响[D]. 北京: 北京 交通大学, 2013. Wang Jingyan. Influence of recycled aggregate defects on the durability of recycled aggregate concrete[D]. Beijing: Beijing Jiaotong University, 2013.
[13] Ma H L, Cui C, Li X, et al. Study of high performance autoclaved shell-aggregate from propylene oxide sludge[J]. Construction and Building Materials, 2011, 25(7): 3030-3037.
2014, Vol. 32 
