矿物复掺及蒸养方式对管片钢渣混凝土力学性能的影响
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摘要
对盾构管片钢渣混凝土蒸养后的力学性能进行了试验研究,分析了不同水胶比及钢渣粉、粉煤灰及矿渣粉等矿物掺合料的掺入对蒸养后钢渣混凝土力学性能的影响,探讨了不同养护方式、蒸养工艺对钢渣混凝土拆模强度的影响。结果表明,水胶比对蒸汽养护制度下早期强度影响较大,对标准养护条件下抗压强度影响小;钢渣粉、粉煤灰及矿渣粉掺入总量为20%时,其拆模强度比其他掺量高,出于经济性及工业废渣的资源化利用考虑,可选强度差距不大的25%掺量;采用试件成型后静养时间2h,然后以15℃/h的升温速率升温至65℃,恒温4h后以15℃/h的降温速率降至室温的蒸养工艺能得到较高的拆模强度。
The compressive properties of steel slag concrete after the application of shield tunnel tube are studied, the different water-binder ratio and steel slag powder, fly ash and slag powder and other incorporation of mineral admixtures on the influence of steel slag concrete pipe are analyzed, the different ways of curing and steaming on the influence of steel slag concrete split modes are discussed. The results show that water-binder ratio has a greater influence on the early strength under steam curing system, the compressive strength of the standard curing conditions is lower. When the total amount of slag powder, fly ash and slag powder is 20%, the strength of the mould is higher than that of other admixture,considering the resource utilization of economy and industrial waste residue, the content of 25% of the optional strength gap is not very high. Quiet time 2 h after the specimen molding, and then at 15℃/h the heating rate of up to 65℃, the temperature at 15℃ after 4 h rate of cooling down to room temperature pipe technology can get high removal strength.
The compressive properties of steel slag concrete after the application of shield tunnel tube are studied, the different water-binder ratio and steel slag powder, fly ash and slag powder and other incorporation of mineral admixtures on the influence of steel slag concrete pipe are analyzed, the different ways of curing and steaming on the influence of steel slag concrete split modes are discussed. The results show that water-binder ratio has a greater influence on the early strength under steam curing system, the compressive strength of the standard curing conditions is lower. When the total amount of slag powder, fly ash and slag powder is 20%, the strength of the mould is higher than that of other admixture,considering the resource utilization of economy and industrial waste residue, the content of 25% of the optional strength gap is not very high. Quiet time 2 h after the specimen molding, and then at 15℃/h the heating rate of up to 65℃, the temperature at 15℃ after 4 h rate of cooling down to room temperature pipe technology can get high removal strength.
引文
[1]铁道部丰台桥梁厂,铁道部科学研究院铁道建筑研究所.混凝土的蒸汽养护[M].北京:中国建筑工业出版社,1978.
[2]马保国,白建飞,王凯,等.隧道管片混凝土蒸养工艺参数的研究[J].现代隧道技术,2008,45(1):71-76.
[3]侯新凯,徐德龙,薛博,等.钢渣引起水泥体积安定性问题的探讨[J].建筑材料学报,2012,15(5):588-595.
[4]邹浩娜,冯勇.钢渣浸水陈化处理时间分析研究[J].粉煤灰综合利用,2016(1):24-26.
[5]王飞虎.矿物掺合料对钢渣混凝土物理力学性能及抗冻性的试验研究[D].乌鲁木齐:新疆农业大学,2016.
[6]韩艳丽,冯勇,肖磊.粗细钢渣替代天然骨料对混凝土力学性能的影响[J].混凝土与水泥制品,2015(2):96-98.
[7]中国国家标准管理委员会.GB/T 50081—2002普通混凝土力学性能试验方法标准[S].北京:中国建筑工业出版社,2003.
[8]史英俊.盾构管片工厂预制生产技术[J].铁道建筑技术,2005(增):131-133.
[9]胡益彰.蒸养条件下大掺量矿物掺合料混凝土的性能研究[D].山东:山东大学,2016.
[10]黎梦圆.大掺量矿物掺合料在蒸养混凝土中的应用研究[D].北京:清华大学,2015.
[11]廖俊萍.矿渣微细粉商品混凝土在蒸养预制构件中的应用[J].混凝土,2004(7):58-60.
[12]Tosun K.Effect of SOS content and fineness on rate of delayed ettringit formation in heat cured Portland cement mortars[J].Cement&Concrete Composhes,2006,28:761-722.
[13]李永鑫.含钢渣粉掺合料的水泥混混凝组成、结构与性能的研究[D].北京:中国建筑材料科学研究院,2003.
[14]晋强,胡荻,张忠哲,等.矿物掺合料对钢渣轨枕混凝土力学及侵蚀性能影响的研究[J].混凝土与水泥制品,2017(9):34-38.
[15]张忠哲,冯勇,晋强,等.钢渣替换骨料对混凝土的力学性能及耐水性影响[J].混凝土,2017(5):76-81.
[2]马保国,白建飞,王凯,等.隧道管片混凝土蒸养工艺参数的研究[J].现代隧道技术,2008,45(1):71-76.
[3]侯新凯,徐德龙,薛博,等.钢渣引起水泥体积安定性问题的探讨[J].建筑材料学报,2012,15(5):588-595.
[4]邹浩娜,冯勇.钢渣浸水陈化处理时间分析研究[J].粉煤灰综合利用,2016(1):24-26.
[5]王飞虎.矿物掺合料对钢渣混凝土物理力学性能及抗冻性的试验研究[D].乌鲁木齐:新疆农业大学,2016.
[6]韩艳丽,冯勇,肖磊.粗细钢渣替代天然骨料对混凝土力学性能的影响[J].混凝土与水泥制品,2015(2):96-98.
[7]中国国家标准管理委员会.GB/T 50081—2002普通混凝土力学性能试验方法标准[S].北京:中国建筑工业出版社,2003.
[8]史英俊.盾构管片工厂预制生产技术[J].铁道建筑技术,2005(增):131-133.
[9]胡益彰.蒸养条件下大掺量矿物掺合料混凝土的性能研究[D].山东:山东大学,2016.
[10]黎梦圆.大掺量矿物掺合料在蒸养混凝土中的应用研究[D].北京:清华大学,2015.
[11]廖俊萍.矿渣微细粉商品混凝土在蒸养预制构件中的应用[J].混凝土,2004(7):58-60.
[12]Tosun K.Effect of SOS content and fineness on rate of delayed ettringit formation in heat cured Portland cement mortars[J].Cement&Concrete Composhes,2006,28:761-722.
[13]李永鑫.含钢渣粉掺合料的水泥混混凝组成、结构与性能的研究[D].北京:中国建筑材料科学研究院,2003.
[14]晋强,胡荻,张忠哲,等.矿物掺合料对钢渣轨枕混凝土力学及侵蚀性能影响的研究[J].混凝土与水泥制品,2017(9):34-38.
[15]张忠哲,冯勇,晋强,等.钢渣替换骨料对混凝土的力学性能及耐水性影响[J].混凝土,2017(5):76-81.