当需要掺加抗剥落剂以提高沥青混合料的水稳性时,应在沥青中添加具有耐热,耐水和长期效果的抗剥落剂,抗剥落剂的选择和掺量由试验确定,并报总监办审批.同时还必须掺加水泥或石灰代替等量矿粉.抗剥落剂应符合表3-4的技术要求.
When anti-spalling agent is needed to improve the water stability of asphalt mixture, anti-spalling agent with heat resistance, water resistance and long-term effect should be added to asphalt. The selection and content of anti-spalling agent should be determined by test and submitted to the Director General for approval. At the same time, cement or lime must be added to replace the same amount of mineral powder. The anti-spalling agent should conform to the technology of Table 3-4. Requirement.
表3-4 抗剥落剂的技术要求
Table 3-4 Technical Requirements for Anti-stripping Agents
指标 技术要求
Technical requirements for indicators
密度 0.95-1.05g/cm3
Density 0.95-1.05g/cm 3
PH ≥7
PH>7
凝固点 ≤0℃
Freezing point < 0 C
掺后，沥青与石料的粘附性 5级
Adhesion of asphalt to aggregate after mixing is grade 5
浸水马歇尔试验残留稳定度 ≥6.5kN
Residual Stability of Immersed Marshall Test (> 6.5kN)
浸水马歇尔试验残留稳定度比 ≥80%
Residual Stability Ratio of Immersed Marshall Test (>80%)
冻融劈裂试验残留强度比 ≥80%
Residual strength ratio of freeze-thaw splitting test (>80%)