Water-based infiltration capillary/crystalline waterproof (WCCW) material can repair damaged concrete and improve concrete's durability. We investigated the impact of WCCW material on early cracking resistance, compressive strength, and chloride ion corrosion resistance in concrete. Moreover, we examined the microstructure morphology of hardened cement pastes using scanning electron microscopy (SEM), the polymerization of Calcium Silicate Hydrate (CSH) gel via Fourier transform infrared spectroscopy (FTIR), and analyzed the penetration depth of WCCW material through energy-dispersive spectrometry (EDS). Experimental findings demonstrate several benefits of WCCW material, including improved appearance quality of concrete, enhanced early cracking resistance, compressive strength, and chloride ion corrosion resistance. Additionally, the material enhances the polymerization of CSH gel and increases the density of concrete. WCCW material penetrates to a maximum depth of 10 mm to 12 mm, obeying Fick's law of diffusion. The strength and curing age of concrete also affect the performance of WCCW material, and the optimal curing age is 14 days.
Key words
concrete /
water-based /
infiltration capillary/crystalline material /
anti-permeability /
penetration depth /
mechanism of action
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 王媛怡,陈 亮,汪在芹.水工混凝土大坝表面防护涂层材料研究进展[J]. 材料导报,2016,30(9):81-86.
[2] ZHANG Y, ZUO L, YANG J, et al. Effect of Cementitious Capillary Crystalline Waterproofing Coating on the Gas Permeability of Mortar[J]. Structural Concrete, 2019, 20(5): 1763-1770.
[3] 匡亚川,欧进萍. 混凝土的渗透结晶自修复试验与研究[J]. 铁道科学与工程学报. 2008, 5(1): 6-10.
[4] RAVITHEJA A, REDDY T, CHANDRA S, et al. Self-healing Concrete with Crystalline Admixture—A Review[J]. Journal of Wuhan University of Technology-Material Science Edition, 2019, 34(5): 1143-1154.
[5] TENG L W, HUANG R, CHEN J, et al. A Study of Crystalline Mechanism of Penetration Sealer Materials[J]. Materials, 2014, 7(1): 399-412.
[6] 姜 骞, 穆 松, 刘建忠, 等. 水性渗透结晶材料对混凝土性能提升研究及机理分析[J]. 新型建筑材料, 2016, 43(3): 49-52, 89.
[7] FERRARA L, KRELANI V, MORETTI F. On the Use of Crystalline Admixtures in Cement Based Construction Materials: From Porosity Reducers to Promoters of Self Healing[J]. Smart Materials and Structures, 2016, 25(8): 0840-0849.
[8] 黄 波, 邓德华, 陈蕙玉. 深度渗透密封剂(DPS)对混凝土抗硫酸盐侵蚀性能的影响[J]. 中南大学学报(自然科学版), 2011, 42(12): 3858-3863.
[9] JC/T 1018—2020,水性渗透型无机防水剂[S]. 北京: 中国建材工业出版社.
[10] WANG J, NG P-L, SU H, et al. Meso-scale Modelling of Stress Effect on Chloride Diffusion in Concrete Using Three-phase Composite Sphere Model[J]. Materials and Structures, 2019, 52(3): 1-23.
[11] LI G, HUANG X, LIN J, et al. Activated Chemicals of Cementitious Capillary Crystalline Waterproofing Materials and Their Self-healing Behaviour[J]. Construction and Building Materials, 2019, 200: 36-45.
[12] 马文娟. 渗透结晶型防水剂研究及其在AAR病害治理中的应用探讨[D]. 成都: 西南交通大学, 2005.
PDF(5404 KB)
