Mechanical properties and micromorphology of redispersible emulsified asphalt powder modified cement mortar

doi:10.16085/j.issn.1000-6613.2021-0875

Abstract

Abstract:

In order to solve the problem of high brittleness and poor toughness of cement-based materials, a method of doping redispersible emulsified asphalt powder (REAP) to improve the toughness of cement-based materials was presented. The redispersible emulsified asphalt particle modified cement mortar (REAPMCM) was prepared, and the REAP contents were 0, 10%, 20% and 30% of the cementitious material, respectively. The effects of REAP on the mechanical properties of REAPMCM, such as compressive strength, flexural strength, flexural-compression ratio and elastic modulus, were studied. The effects of REAP on the micromorphology of cement hydration products were analyzed, and the micromorphology of cement emulsified asphalt mortar prepared with emulsified asphalt was compared. The results showed that with the increase of REAP content, the compressive, flexural strength and elastic modulus of REAPMCM were reduced, and the flexural-compression ratio was increased. The flexural-compression ratio of REAPMCM with 30% REAP was 28.5%, which was 46.6% higher than that without REAP. The addition of REAP improved the toughness of cement-based materials, but as the age of cement hydration increased, its improvement effect decreased. As the amount of REAP increased, the total porosity of the slurry and the asphalt film area between cement hydration products increased, and its section micromorphology was basically similar to that of emulsified asphalt mortar with the same asphalt solid content. It was proved that REAP also had good dispersibility and can be distributed in the cement hydration product as a film, achieving similar application effect as the modification of cement-based materials by emulsified asphalt emulsion.

Key words: asphalt, cement, mortar, mechanical properties, microstructure

摘要：

为解决水泥基材料脆性大、韧性差问题，本文提出了掺加可再分散乳化沥青粉末（REAP）以改善水泥基材料韧性的方法。试验制备了REAP 掺量为胶凝材料用量0、10%、20%、30%的可再分散乳化沥青颗粒改性水泥砂浆（REAPMCM），研究了REAP对REAPMCM抗压、抗折强度、折压比、弹性模量等力学性能影响，分析了其对水泥水化产物微观形貌影响，对比了其与采用乳化沥青制备水泥乳化沥青砂浆微观形貌。结果表明，随着REAP掺量增加，REAPMCM抗压、抗折强度与弹性模量均有所降低，折压比有所提高，REAP掺量30%的REAPMCM折压比为28.5%，其相比未掺加REAP砂浆的折压比提高了46.6%；掺入REAP改善了水泥基材料的韧性，但其改善效果随着水泥水化龄期增长而有所降低；随着REAP掺量增加，一方面浆体总孔隙率含量有所增大，另一方面水泥水化产物间填充覆盖的沥青膜面积增大，且其断面显微形貌与相同沥青固含量掺量的乳化沥青砂浆断面基本类似，证实了REAP亦可较好分散、成膜分布于水泥水化产物间，达到了其与乳化沥青乳浊液对水泥基材料改性相类似的使用效果。

关键词: 沥青, 水泥, 砂浆, 力学性能, 显微结构

CLC Number:

TB332

LIU Jing, ZHENG Xinguo, LI Tiejun, WANG Caiping, ZHAO Yanxu, LI Ying, LOU Liangwei, SHEN Wei. Mechanical properties and micromorphology of redispersible emulsified asphalt powder modified cement mortar[J]. Chemical Industry and Engineering Progress, 2022, 41(4): 2015-2021.

刘竞, 郑新国, 李铁军, 王财平, 赵彦旭, 李颖, 楼梁伟, 沈伟. 可再分散乳化沥青粉末改性水泥砂浆的力学性能和微观形貌[J]. 化工进展, 2022, 41(4): 2015-2021.

Figures/Tables 10

References 18

1	潘硕, 王琴, 詹达富, 等. 乳化沥青粉改性水泥砂浆性能及微观结构研究[J]. 硅酸盐通报, 2019, 38(8): 2622-2630.
	PAN Shuo, WANG Qin, ZHAN Dafu，et al. Properties and microstructure of emulsified asphalt powder modified cement mortar[J] .Bulletin of the Chinese Ceramic Society, 2019, 38(8): 2622-2630.
2	邱碧, 丁铸, 张松. PTB乳液对水泥砂浆力学性能和抗侵蚀性能的影响[J]. 中国建材科技, 2021, 30(1): 57-59.
	QIU Bi, DING Zhu, ZHANG Song. Effect of PTB emulsion on mechanical properties and corrosion resistance of cement mortar[J]. China Building Materials Science & Technology, 2021, 30(1): 57-59.
3	胡慧晓. 水泥基纤维增韧材料的性能与加筋增韧机理研究[D]. 舟山：浙江海洋大学, 2019.
	HU Huixiao. Study on properties and reinforcement and toughening mechanism of cement-based fiber toughened materials[D]. Zhoushan: Zhejiang Ocean University, 2019.
4	李悦, 何赫. 聚合物改性水泥砂浆的研究进展[J]. 功能材料, 2016, 47(7): 7038-7045.
	LI Yue, HE He. Research progress of polymer-modified cement mortar[J]. Journal of Functional Materials, 2016, 47(7): 7038-7045.
5	孟博旭, 许金余, 顾超, 等. 苯丙乳液和VAE乳液改性水泥砂浆力学性能的试验研究[J]. 建筑科学, 2019, 35(1): 88-94.
	MENG Boxu, XU Jinyu, GU Chao, et al. Experimental study on effect of poly-asphalt ratio on mechanical properties of styreneacrylate emulsion and VAE-Modified cement mortar[J].Building Science, 2019, 35(1): 88-94.
6	谢永江, 郑新国, 李书明, 等. 温度对水泥乳化沥青砂浆韧性的影响[J]. 建筑材料学报, 2013, 16(6): 962-967.
	XIE Yongjiang, ZHENG Xinguo, LI Shuming, et al. Influence of temperature on toughness of emulsified asphalt cement mortar[J]. Journal of Building Materials, 2013, 16(6):962-967.
7	王超, 邓德华, 元强. 沥灰比对水泥乳化沥青砂浆断裂韧性的影响[J]. 硅酸盐学报, 2016, 44(5): 627-633.
	WANG Chao, DENG Dehua, YUAN Qiang. Influence of mass ratio of asphalt to cement on fracture toughness of emulsified asphalt cement mortar[J]. Journal of the Chinese Ceramic Society, 2016, 44(5): 627-633.
8	LIU Jing, ZENG Xinguo, LI Shuming, et al. Effect of the stabilizer on bubble stability and homogeneity of cement emulsified asphalt mortar in slab ballastless track[J]. Construction and Building Materials, 2015, 96: 135-146.
9	朱晓斌, 洪锦祥, 李炜. 水泥沥青砂浆中水泥-乳化沥青经时吸附行为[J]. 建筑材料学报, 2018, 21(2): 260-267.
	ZHU Xiaobin, HONG Jinxiang, LI Wei. Adsorption behavior over time between cement and asphalt emulsion in cement-asphalt mortar[J]. Journal of Building Materials, 2018, 21(2): 260-267.
10	POULIOT N, MARCHAND J, PIGEON M. Hydration mechanisms, microstructure, and mechanical properties of mortars prepared with mixed binder cement slurry-asphalt emulsion[J]. Journal of Materials in Civil Engineering, 2003, 15(1): 54-59.
11	李力, 熊出华, 咸淼. 乳化沥青改性水泥砂浆性能试验研究[J]. 中外公路, 2009, 29(1): 238-241.
	LI Li, XIONG Chuhua, XIAN Miao. Experimental study on the performance of emulsified asphalt modified cement mortar[J]. Journal of China & Foreign Highway, 2009, 29(1): 238-241.
12	唐子珂. 乳化沥青掺量对CA砂浆工作性能和力学性能的影响研究[J]. 西部交通科技, 2017(8): 32-35.
	TANG Zike. Study on the effect of emulsified asphalt content on work performance and mechanical properties of CA mortar[J]. Western China Communications Science & Technology, 2017(8): 32-35.
13	ZHENG X G, LIU J, ZENG Z, et al. Rheological behavior, segregation, microstructure, and construction quality of cement-emulsified asphalt mortar with associative thickener[J]. Journal of Materials in Civil Engineering, 2015, 27(11): 04015025.
14	MYERS D. Surfactant science and technology[M]. 2nd ed. New York: VCN, 1992.
15	WANG Qin, PAN Shuo, ZHAN Dafu, et al. A study of the transport properties of emulsified asphalt powder-modified cement mortar[J]. Construction and Building Materials, 2020, 248: 118650.
16	潘硕. 乳化沥青粉对水泥基材料性能影响研究[D]. 北京: 北京建筑大学, 2020.
	PAN Shuo. Study on the influence of emulsified asphalt powder on the properties of cement-based materials[D]. Beijing: Beijing University of Civil Engineering and Architecture, 2020.
17	李书明. 水泥乳化沥青砂浆韧性研究[D]. 北京: 中国铁道科学研究院, 2011.
	LI Shuming. Research on the loughness of emulsified asphalt cement mortar[D]. Beijing: China Academy of Railway Sciences, 2011.
18	TAN Yiqiu, OUYANG Jian, Jianfu LYU, et al. Effect of emulsifier on cement hydration in cement asphalt mortar[J]. Construction and Building Materials, 2013, 47: 159-164.

样品编号	沥青类型	m_A/m_C	m_W/m_C	m_C/m_S
M0	—	0	0.5	0.5
M1	REAP	0.1	0.5	0.5
M2	REAP	0.2	0.5	0.5
M3	REAP	0.3	0.5	0.5
EM3	EA	0.3	0.5	0.5

样品编号	沥青类型	m_A/m_C	m_W/m_C	m_C/m_S
M0	—	0	0.5	0.5
M1	REAP	0.1	0.5	0.5
M2	REAP	0.2	0.5	0.5
M3	REAP	0.3	0.5	0.5
EM3	EA	0.3	0.5	0.5

[1]	YAN Qing, ZHANG Yunfeng, ZHAO Minwei, SONG Ning, GAO Hui, ZHOU Jing. Feasibility analysis of large span compensation platform for LNG terminal [J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 158-165.
[2]	WANG Jiaqing, SONG Guangwei, LI Qiang, GUO Shuaicheng, DAI Qingli. Rubber-concrete interface modification method and performance enhancement path [J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 328-343.
[3]	DONG Jiayu, WANG Simin. Experimental on ultrasound enhancement of para-xylene crystallization characteristics and regulation mechanism [J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4504-4513.
[4]	LIAO Zhixin, LUO Tao, WANG Hong, KONG Jiajun, SHEN Haiping, GUAN Cuishi, WANG Cuihong, SHE Yucheng. Application and progress of solvent deasphalting technology [J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4573-4586.
[5]	LI Dongze, ZHANG Xiang, TIAN Jian, HU Pan, YAO Jie, ZHU Lin, BU Changsheng, WANG Xinye. Research progress of NO _x reduction by carbonaceous substances for denitration in cement kiln [J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4882-4893.
[6]	ZHANG Yaojie, ZHANG Chuanxiang, SUN Yue, ZENG Huihui, JIA Jianbo, JIANG Zhendong. Application of coal-based graphene quantum dots in supercapacitors [J]. Chemical Industry and Engineering Progress, 2023, 42(8): 4340-4350.
[7]	ZHAO Jian, ZHUO Zewen, DONG Hang, GAO Wenjian. A new method for observation of microstructure of waxy crude oil and its emulsion system [J]. Chemical Industry and Engineering Progress, 2023, 42(8): 4372-4384.
[8]	TAN Lipeng, SHEN Jun, WANG Yugao, LIU Gang, XU Qingbai. Research progress on blending modification of coal tar pitch and petroleum asphalt [J]. Chemical Industry and Engineering Progress, 2023, 42(7): 3749-3759.
[9]	ZHAO Yi, YANG Zhen, ZHANG Xinwei, WANG Gang, YANG Xuan. Molecular simulation of self-healing behavior of asphalt under different crack damage and healing temperature [J]. Chemical Industry and Engineering Progress, 2023, 42(6): 3147-3156.
[10]	XU Xian, CUI Louwei, LIU Jie, SHI Junhe, ZHU Yonghong, LIU Jiaojiao, LIU Tao, ZHENG Hua’an, LI Dong. Effect of raw material composition on the development of semicoke mesophase structure [J]. Chemical Industry and Engineering Progress, 2023, 42(5): 2343-2352.
[11]	TIAN Qikai, ZHENG Haiping, ZHANG Shaobin, ZHANG Jing, YU Ziyi. Advances in mixing enhanced microfluidic channels [J]. Chemical Industry and Engineering Progress, 2023, 42(4): 1677-1687.
[12]	ZHAO Xingcheng, JIA Fangxu, JIANG Weiyu, CHEN Jiayi, LIU Chenyu, YAO Hong. Redox mediators-mediated anaerobic ammonium oxidation process for biological nitrogen removal: a review [J]. Chemical Industry and Engineering Progress, 2023, 42(3): 1606-1617.
[13]	ZHAO Yi, YANG Zhen, WANG Jia, LI Jingwen, ZHENG Yu. Research progress on molecular dynamics simulation of self-healing behavior of asphalt binder [J]. Chemical Industry and Engineering Progress, 2023, 42(2): 803-813.
[14]	LI Jingjing, ZHAO Yao, XU Fengchi, LI Kangjian. Heavy metal leaching characteristics of porous asphalt mixture containing MSWI-BAA under different stormwater runoff flow rates [J]. Chemical Industry and Engineering Progress, 2023, 42(10): 5520-5530.
[15]	PAN Yuelei, CHENG Xudong, YAN Mingyuan, HE Pan, ZHANG Heping. Silica aerogel and its application in the field of thermal insulation [J]. Chemical Industry and Engineering Progress, 2023, 42(1): 297-309.