摘要
在水泥与脱硫灰总掺量(15.00%)不变的情况下,研究了脱硫灰的种类(重钢脱硫灰、鄂钢脱硫灰)和掺量(11.25%、12.00%)对水泥脱硫灰稳定再生骨料混合料力学性能和耐久性能的影响。结果表明:随着脱硫灰掺量的增加,混合料的无侧限抗压强度、间接抗拉强度、抗压回弹模量均降低;相同脱硫灰掺量下,水泥重钢脱硫灰稳定再生骨料混合料的无侧限抗压强度、间接抗拉强度、抗压回弹模量均比水泥鄂钢脱硫灰稳定再生骨料混合料的低;与纯水泥稳定再生骨料混合料(对照组)相比,水泥脱硫灰稳定再生骨料混合料的抗冻性能较差,但干缩性能有明显改善;水泥脱硫灰稳定再生骨料混合料的重金属浸出毒性符合相关标准要求。
When the total content of cement and desulfurization ash(15.00%)remained unchanged,the effects of the types(Chongqing steel desulfurization ash,Hubei steel desulfurization ash)and contents(11.25%,12.00%)of desulfurization ash on the mechanical properties and durability of cement-desulfurization ash stabilized recycled aggregate mixture were studied.The results show that with the increase of desulfurization ash content,the unconfined compressive strength,splitting strength,compressive modulus of resilience of the mixture decrease.Under the same content,the unconfined compressive strength,splitting strength,compressive modulus of resilience of cement-Chongqing steel desulfurization ash stabilized recycled aggregate mixture are lower than those of cement-Hubei steel desulfurization ash stabilized recycled aggregate mixture.Compared with the pure cement stabilized recycled aggregate mixture(control group),the cement-desulfurization ash stabilized recycled aggregate mixture has poor frost resistance,but significant improvement in dry shrinkage performance.The leaching toxicity of heavy metal of cement-desulfurization ash stabilized recycled aggregate mixture meets the requirements of relevant standards.
作者
夏平
XIA Ping(Shanghai Fengxian Traffic Construction Management Center,Shanghai 201400,China)
出处
《混凝土与水泥制品》
2023年第7期95-98,102,共5页
China Concrete and Cement Products
基金
上海市交通委员会科研项目(JT2021-KY-011)。
关键词
干法脱硫灰
再生骨料
水泥稳定材料
力学性能
路用性能
耐久性能
Dry desulfurization ash
Recycled aggregate
Cement stabilized material
Mechanical property
Road performance
Durability
