Effect of Structure Feature of Poly(VAc-DBM-AA-AMPS) Emulsion on Mechanical Properties of Cement Mortars

doi:10.19491/j.issn.1001-9278.2019.01.008

Abstract

Abstract: The effect of poly(VAc-co-DBM-co-AA-co-AMPS) emulsion on the mechanical properties and durability of cement mortars were investigated by compression and tensile experiments. The results indicated that the salt tolerance of emulsion film was improved significantly by introduction of AMPS functional monomer. Meanwhile, the compressive strength of cement mortars was influenced greatly by the dosage of AMPS, and the cement mortars achieved a maximum value in compressive strength when poly(VAc-co-DBM-co-AA-co-AMPS) emulsion contained 2.0 g of AMPS. The salt resistance and freeze-thaw resistance of the modified cement mortar was improved remarkably compared to ordinary concrete. SEM observation indicated that the incorporation of polymeric emulsion could modify the pore-size distribution of cement mortars, and a network structure was formed to improve the interfacial zone between cement paste and aggregate accordingly.

References

[1] Choi J H, Lee Y H. International Conference on Creep, Shrinkage and Durability of Concrete and Concrete Structures[J]. Magazine of the Korea Concrete Institute, 2009, 21.
[2] 王在杭, 陈潇, 王稷良. 新型聚合物改性水泥混凝土路用性能研究[J]. 新型建筑材料, 2016, 43(10):56-59.
[3] 卿丽雅. 聚合物机制砂水泥混凝土路用性能研究[D]. 重庆交通大学, 2017.
[4] 王稷良, 陈潇. 聚合物改性水泥混凝土表面功能层材料设计与性能研究[C]// 全国公路养护新材料应用技术大会论文集. 2015.
[5] 张国防, 王亚文, 和瑞,等. 高吸水性聚合物对水泥砂浆物理力学性能的影响[J]. 建筑材料学报, 2017(5):661-666.
[6] 许祥俊. 聚合物水泥基固沙材料的研究[D]. 武汉理工大学, 2003.
[7] 左艳梅. 环境友好型聚合物水泥砂浆基复合材料研究进展[J]. 合成材料老化与应用, 2017, 46(3):108-113.
[8] Brenna A, Bolzoni F, Beretta S, et al. Long-term chloride-induced corrosion monitoring of reinforced concrete coated with commercial polymer-modified mortar and polymeric coatings[J]. Construction & Building Materials, 2013, 48(48):734-744.
[9] Kong X M, Wu C C, Zhang Y R, et al. Polymer-modified mortar with a gradient polymer distribution: Preparation, permeability, and mechanical behaviour[J]. Construction & Building Materials, 2013, 38(1):195-203.
[10] 农金龙. 聚合物改性水泥基粘结复合材料的粘结性能研究[D]. 湖南大学, 2014.
[11] Zhong S Y. Effect of Fibers on Surface Water Evaporation of Polymer-Modified Mortar[J]. Journal of Building Materials, 2010, 13(6):728-732.
[12] C. Zhao, G. Peng, B. Liu, et al, Synergistic effect of organically modified layered double hydroxide on thermal and flame-retardant properties of poly (butyl acrylate–vinyl acetate)[J]. Journal of Polymer Research, 2011, 18:1971-1981.
[13] 殷敬华, 莫志深. 现代高分子物理学[M]. 科学出版社, 2001.
[14] 祁晓华. 耐盐性高吸水树脂的合成及其溶胀动力学研究[D]. 兰州大学, 2009.
[15] Mequanint K, Patel A, Bezuidenhout D. Synthesis, swelling behavior, and biocompatibility of novel physically cross-linked polyurethane-block-poly(glycerol methacrylate) hydrogels.[J]. Biomacromolecules, 2006, 7(3):883-891.
[16] Ohama Y, Takahasi S, Ota M. Effects of accelerated curing conditions on strength properties of polymer-modified mortars with SBR latex and hardener-free epoxy resin(special issue on structural materials)[J]. Journal of the Society of Materials Science, Japan, 2005, 54(8): 804-809.
[17] G?bel L, Bos C, Schwaiger R, et al. Micromechanics-based investigation of the elastic properties of polymer-modified cementitious materials using nanoindentation and semi-analytical modeling[J]. Cement & Concrete Composites, 2018, 88:100-114.
[18] Papaioannou S, Argyropoulou R, Kalogiannidou C, et al. Mechanical and adhesion properties of polymer-modified cement mortars in relation with their microstructure[J]. Journal of Adhesion, 2018:1-20.
[19] Li Y W, Xue X, Yang Z, et al. A Comparison Study of the Rapid Setting Conventional and Polymer-Modified Waterproof Mortars[J]. Advanced Materials Research, 2017, 1142:317-322.
[20] 张二芹. 聚合物改性水泥混凝土的力学性能及耐久性研究[D]. 沈阳工业大学, 2016.
[21] 殷璐. 热还原石墨烯改性水泥砂浆抗盐腐蚀性能研究[D]. 重庆交通大学, 2017.