Experiment Study on Mechanical Performance of Shale Lightweight Aggregate Concrete

Abstract:

High performance lightweight aggregate concrete is a kind of lightweight environment-protected building material with high strength, good workability, volume stability and durability, which is widely used in large scale engineering and some important engineering. In this paper water-binder ratio, fly ash content, pre-wetting time, sand ratio were tested to explore the comprehensive strength of lightweight aggregate concrete(LWAC). SEM was used to observe the microstructure characteristics of the specimens. The results showed that LWAC produced in the experiment present good performance, whose apparent density was 1760 Kg/m3～1930Kg/m3, 28d compressive strength was 55MPa～60MPa. Reasonable amounts of sand ratio(38%) and mineral admixtures(10%) were exited and the self-strength of lightweight aggregate played an important role in the preparation of LWAC. In the meanwhile, lightweight aggregates which were pre-wetted effectively increased the later strength.

• Periodical: Advanced Materials Research (Volume 530)
• Pages: 80-84
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.530.80
• Online since: June 2012
• Authors: Lin Li, Qing Wang, Yu Wang, Zhao Yang Ding
• Keywords: Coarse Shale Aggregates, Lightweight Aggregate Concrete (LWAC), Mechanical Performance, Microanalysis

References

[1] Ding Jianjun, Shi Gang, Jiang Congsheng. Experimental optimization of lightweight aggregate concrete on workability [J]. Concrete, 2007(1): 34-36.

[2] Tiewei Zhan, odd E. Gjory. Diffusion behavior of chloride ions in concrete[J]. Cement and Concrete Research, 1996, 26(6): 907-917.

DOI: 10.1016/0008-8846(96)00069-5

[3] Wang Qing, Wang Lijiu, Ai Hongmei. Research on soda residue and fly ash high strength ceramsite [J]. Concrete, 2000, (6): 72-74.

[4] GaoX F. Investigation of micro-cracks and microstructure of high performance lightweight aggregate concrete[J]. Building and Environment, 2002(37): 485-488.

DOI: 10.1016/s0360-1323(01)00051-8

[5] Hu Shuguang, Wang Fazhou, Ding Qingjun. Interface structure between lightweight aggregate and cement paste [J]. Journal of The Chinese Ceramic Society, 2005(33): 731-734.

[6] Rossignolo J A. Mechanical properties of polymer-modified lightweight aggregate concrete[J]. Cement and Concrete Research, 2002(32): 329-338.

DOI: 10.1016/s0008-8846(01)00678-0

[7] ChenH J. Determination of the dividing strength and its relation to the concrete strength in lightweight aggregate concrete[J]. Cement and Concrete Composition, 1998(21): 29-38.

DOI: 10.1016/s0958-9465(98)00035-3

[8] Liu Jun, Li Zhenguo, Wang Dongshan, Niu Wan-yang. Influence of sinter system on physical properties of slag-fly ash lightweight aggregate[J]. Journal of Shenyang Architectural and Civil Engineering Institute, 2005, 5(21): 511-514.

[9] Hu Shuguang, Wang Fazhou. Lightweight Aggregate Concrete[D]. Bei Jing: Chemical industry press: 2006. 23.

[10] Cheng Zhiqing. The research on high performance lightweight aggregate concrete [D] Chang Sha: Central South University, 2007: 41-43.

[11] Zhang Yong, Ding Qingjun, Yu Fazhou, Hu Shuguang. The study on the transition zone of lightweight aggregate concrete [J]. Concrete, 2002(10): 29-31.