In order to explore the factors affecting the strength of lightweight and high-strength foamed cement, ordinary Portland cement is used as the cementing material, and the target dry density is 400~410kg/m3 by controlling the content of foaming agent and foam stabilizer. Lightweight high-strength foamed cement specimen with strength of 4.4MPa. Controlling a single variable, the compressive strength and microscopic morphology changes of foamed cement specimens with different self-made reinforcing agent content and fly ash content were studied. The research results show that when the fly ash content is 20%, the strength of the sample without reinforcing agent reaches the best 2.4MPa; when 2wt% of the reinforcing agent is added, the strength of the sample reaches the maximum compressive strength of 4.4MPa, an increase of 83 %. Scanning electron microscope microscopic morphological observation results show that after adding the reinforcing agent, the foamed cement cell is more uniform, the cell wall becomes denser, and the cell defects are reduced, which explains the macroscopic advantages of lightweight and high-strength foamed cement.

Qiang Chen, Huali Liu, Peng Jiang, Yongling Ding, Huadong Sun, Yijun Chen. Research on the Influencing Factors of the Strength of Lightweight High Strength Foamed Cement. Academic Journal of Engineering and Technology Science (2021) Vol. 4 Issue 1: 76-81. https://doi.org/10.25236/AJETS.2021.040108.

[1] Zhu Qingwei, Wu Fade, Zhao Jinping. Research status and progress of exterior wall insulation materials[J]. New Building Materials, 2012 (6): 12-16.

[2] Li Qiuyi, Zhang Xiuqin, Han Shuai, et al. Performance test study on foaming system of desulfurized petroleum coke-sulfoaluminate cement[J]. Concrete and Cement Products, 2015(07): 87-90.

[3] Xu Huijun, Wang Qian, Li Sen, et al. Study on the water resistance of magnesium oxychloride cement by the ratio and additives[J]. Journal of Shandong University of Technology, 2016, 30(05), 49-51.

[4] Qi Fei, Zhang Changsen. The influence of additives on the properties of magnesium oxychloride foamed cement[J]. Building Energy Efficiency, 2017, 45(01): 69-71.

[5] Liu Chengjian, Zhang Zhenqiu, Ge Zhongxi. Application of ultra-light composite cement foam insulation board in external wall insulation[J]. Concrete, 2016(10): 127-130.

[6] Zhang Xin, Ye Jianfeng, Zhou Haibing, et al. Experimental research on new external wall thermal insulation materials[J]. Bulletin of the Chinese Ceramic Society, 2013, 32(05): 982-986.

[7] Hu Guisheng, Zhang Chao, Qian Chenyang, et al. Overview of the latest research progress on the comprehensive utilization of molybdenum tailings resources[J]. Materials Review, 2019, 33(S2): 233-238.

[8] Wang Zhiyu, Li Chun, Duan Yumin, et al. The influence of graphene oxide on the structure and properties of foamed cement[J]. Nonmetallic Minerals, 2020, 43(03): 26-29.

[9] Wang Jun, Fan Chen. Preparation of foamed cement and its physical and mechanical properties [J]. New Building Materials, 2019, 46(05): 152-155.

[10] Guo Jialin, Wang Zhiyu, Liu Mingbao. Study on the mechanical properties of aluminum powder reinforced molybdenum tailing foamed cement[J]. Comprehensive Utilization of Mineral Resources, 2020(04): 167-171.

[11] Cao Jiahao, Li Yajing, Liu Hongli, et al. Microstructure and properties of SiO2 aerogel/foamed cement-based composites[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(04): 1064-1070.

[12] Sheng Hao, Jiang Qiufang, Nie Yujing, et al. The influence of wood flour content on the properties of foamed magnesium oxychloride cement[J]. New Building Materials, 2020, 47(03): 125-128+153.

[13] Zhou Xia. The effect of glass fiber on the performance of sulfoaluminate cement-based foamed insulation board[J]. New Building Materials, 2019, 46(02): 102-104+117.

[14] Zhu Ming, Wang Fanggang, Zhang Xulong, et al. Research on the relationship between the pore structure and thermal conductivity of foamed concrete[J]. Journal of Wuhan University of Technology, 2013, 35(03): 20-25.

[15] Dai Yuchen, Gao Peiwei, Lin Hui, et al. Study on the influence of foam concrete pore structure on compressive strength[J]. New Building Materials, 2018, 45(03): 130-133.

[16] Dai Yonggang, Ma Menglan, Zhang Guotao. Research on the Rheological Properties of Foamed Cement Slurry[J]. Journal of Hubei Institute of Technology, 2020, 36(04): 44-46+50.

[17] Su Haiting, Wu Qize, Ma Qian, et al. Foaming effect evaluation of four cement foaming agents[J]. Journal of Shandong Agricultural University (Natural Science Edition), 2020, 51(03): 559-561.

[18] Wang Luming, Feng Koubao, Chen Xuefei. Research on the water resistance and mechanism of composite modified magnesium oxychloride cement foamed concrete[J]. Functional Materials, 2015, 46(12): 12009-12014.

[19] VELANDIA DF, LYNSDALE CJ, PROVIS JL, et al. Effect of mix design inputs, curing and compressive strength on the durability of Na2SO4-activated high volume fly ash concretes[J]. Cement and Concrete Composites, 2018, 91: 11-20.

[20] Jin Yongfei, Li Chuansheng, Cheng Ming. Research and application of foamed cement solidified filling materials[J]. Coal Mine Safety, 2020, 51(06): 37-42.

[21] Duo Zhang, Weifeng Wang, Jun Deng, et al. Experimental study and application of LASC foamed concrete to create airtight walls in coal mines[J]. Advances in Materials Science and Engineering, 2020, 2020.

[22] Jin Yongfei, Yan Li, Zhang Dian, et al. Optimization of filling materials for fire fighting foamed cement curing in mines