激发剂对钢渣混凝土性能的影响

发布时间：2018-03-13 15:22

本文选题：激发剂　切入点：钢渣混凝土　出处：《新疆农业大学学报》2017年02期 　论文类型：期刊论文

【摘要】：在前期对激发剂掺量进行筛选的基础上,选用4%Na_2SO_4、1%NaOH、1%Na_2SiO_33种激发剂以单掺掺量进行两两双掺及三掺,分别加入到以20%钢渣粉、50%钢渣砂和30%钢渣石替代的基准钢渣混凝土中。通过将掺入不同激发剂的钢渣混凝土和普通混凝土分别养护3、7、28d,测定钢渣混凝土的抗压强度及其差异值,比较不同龄期活性激发钢渣混凝土的抗压强度,并对抗压强度较高的一组钢渣混凝土进行抗硫酸盐侵蚀试验,分析钢渣混凝土在4个月侵蚀期内的抗侵蚀性能。研究表明,激发剂能显著提高钢渣的活性,从而提高钢渣混凝土的强度;单掺1%NaOH对钢渣混凝土的激发效果最明显,其养护28d强度甚至超过了普通混凝土强度。不同激发剂作用下钢渣混凝土在养护28d时,抗压强度表现差异明显,且将3种激发剂复掺时配置的钢渣混凝土效果最好,与未掺入激发剂的钢渣混凝土相比其养护28d强度的增长效应值达到了23.4%。不同激发剂的加入对钢渣混凝土抗侵蚀性能影响不同,但总体上对抗侵蚀性能有帮助。
[Abstract]:On the basis of the previous screening of the amount of the activator, we choose 4NaS _ 2SO _ 2SO _ 4 / S _ 4 and NaO _ H _ 2SiO _ 3, 33 kinds of activators to be mixed in two pairs and three in a single dosage. It was added to the standard steel slag concrete replaced by 20% steel slag powder 50% steel slag sand and 30% steel slag stone respectively. The compressive strength and the difference value of steel slag concrete were measured by curing the steel slag concrete and ordinary concrete with different activators for 3 ~ 7 ~ 28 days, respectively. The compressive strength of activated steel slag concrete at different ages was compared, and a group of steel slag concrete with high compressive strength was tested for sulfate corrosion resistance. The corrosion resistance of steel slag concrete during the 4 months corrosion period was analyzed. The activator can significantly improve the activity of steel slag and thus enhance the strength of steel slag concrete, and only 1 NaOH can excite the steel slag concrete most obviously. Under the action of different activators, the compressive strength of steel slag concrete is obviously different when curing for 28 days, and the steel slag concrete mixed with three activators has the best effect, and the strength of the steel slag concrete is even higher than that of the ordinary concrete under the action of different activators, and the compressive strength of the steel slag concrete is obviously different when it is cured for 28 days. Compared with the steel slag concrete without activator, the growth effect value of curing strength of steel slag concrete reached 23.40.The effect of different activator on the corrosion resistance of steel slag concrete is different, but it is helpful to resist the corrosion of steel slag concrete as a whole.
【作者单位】：新疆农业大学水利与土木工程学院;新疆绿色建筑股份有限公司;
【基金】：新疆维吾尔族自治区乌鲁木齐市建设委员会研究项目(WZCG108001C216) 新疆维吾尔自治区自然科学基金项目(2015211A018)
【分类号】：TU528

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