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摘要: 分析了FYT涂膜类防水粘结材料的基本性质, 测定了它的具体技术指标, 通过室内剪切与拉拔试验, 确定了FYT的最佳用量与最佳用量范围, 研究了温度、界面粗糙度和水对FYT路用性能的影响, 并与其他常用防水粘结材料进行了路用性能对比分析。分析结果表明: FYT-1#最佳洒布量为1.4~1.5 kg.m-2, FYT-2#的最佳洒布量为0.10~0.15 kg.m-2; FYT在25℃时的抗剪强度与抗拉强度是60℃时的7~8倍; 当遇水浸泡后, FYT抗剪强度损失3.0%, 拉拔强度损失7.5%;FYT与同步碎石粘结性能相差不大, 而与其他防水粘结材料相比, 其抗剪强度与拉拔强度均高出3~4倍。可见, FYT具有优良的路用性能。Abstract: The basic properties of FYT waterproof were analyzed.Its specific technical indices were measured.Its optimum amount and optimum dosage range were determined by shear test and pullout test in laboratory.The influences of temperature, interfacial roughness and water on the pavement performance of FYT waterproof were studied systematically.Comparison test analysis for FYT waterproof and the others used in common were carried out.Analysis result shows that optimum spreading volume for FYT-1# is 1.4~1.5 kg·m-2, and that for FYT-2# is 0.10~0.15 kg·m-2.The shear strength and tensile strength of FYT at 25 ℃ is 7~2times of that at 60 ℃.The losses of shear strength and tensile strength of FYT are respectively 3.0% and 7.5% after soaking in water.Comparing with other waterproofs, except for synchronous crushed stone, its shear strength and tensile strength are 3~4 times of that of the others.Obviously, FYT has good pavement performance.
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Key words:
- pavement material /
- FYT /
- pavement performance /
- laboratory test /
- comparative analysis
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表 1 技术指标
Table 1. Technical indices
性能指标 FYT-1# FYT-2# 外观 棕褐色乳液, 搅拌棒上无沾附颗粒, 色泽均匀 均匀, 细腻, 无杂质, 无结块 固体含量/% ≥45 ≥65 低温柔性 -25℃, 2 h, 绕10 mm圆棒一周无裂纹 -30 ℃, 10 d, 绕3 mm圆棒一周无裂纹 粘结强度(20 ℃)/MPa ≥0.3 ≥1.0 耐热性 160 ℃, 30 min, 涂膜不流淌, 无滑动, 无气泡 180 ℃, 5 h, 涂膜不流淌, 无滑动, 无气泡 抗剪强度(25 ℃, 剪切角α=40°)/MPa ≥0.3 ≥1.0 不透水性(0.3 MPa, 30 min) 不透水 不透水 抗低温冻融柔性 -20 ℃~20 ℃, 2 h, 3次循环, 无裂纹 -20 ℃~20 ℃, 2 h, 3次循环, 无裂纹 耐碱性(在2% NaOH中浸15 d) 无变化 无变化 耐酸性(在2% H2SO4中浸15 d) 无变化 无变化 耐盐性(在10% NaCl中浸15 d) 无变化 无变化 
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表 2 强度试验结果
Table 2. Strength test results
工况 剪切试验 拉拔试验 抗剪强度/MPa 平均值/MPa 抗拉强度/MPa 平均值/MPa 正常情况 0.636 5 0.635 0 0.489 7 0.486 9 0.629 8 0.481 5 0.638 7 0.489 5 模拟降雨后 0.616 2 0.615 9 0.457 8 0.450 4 0.612 8 0.444 3 0.618 7 0.449 1
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