煤气化渣对环氧树脂砂浆道路修补材料性能的影响
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摘要
以煤气化渣为填料改性普通环氧树脂砂浆制备道路修补材料。试验结果表明:煤气化渣的加入降低了砂浆的流动性,但可以大幅度提高砂浆的力学性能。与基准环氧树脂砂浆相比,掺入环氧树脂质量的40%煤气化渣制备的改性砂浆,1 d抗压强度提高74%,28 d抗压强度提高33.3%。早期抗压强度的提高有利于缩短道路修补的工作时间。同时加入煤气化渣降低了砂浆的收缩性能。砂浆微观结构显示:煤气化渣的加入增加了砂浆的密实度,减少了砂浆中存在的孔洞,断裂纹由连续长条状改变为台阶状,表明降低了砂浆的脆性。
The road repair material was prepared by modification of epoxy resin mortar with coal gasification ash in this paper. The experimental results shows that the addition of coal gasification ash reduces the mobility of mortar, but can greatly improve the mechanical properties of mortar.Compared with the standard epoxy resin mortar, the compressive strength of the modified mortar prepared by adding 40 % of the mass of epoxy resin increased by 74 % in 1 day and 33.3 % in 28 days. The increase of early compressive strength is beneficial to shorten the time of road repair working. At the same time, adding coal gasification slag reduced the shrinkage performance of the mortar. The microstructure of the mortar showed that the coal gasification ash increased the compactness of the mortar, reduced the hole in the mortar, and the crack was changed from continuous long strip to step, which indicated that the brittleness of the mortar was reduced.
The road repair material was prepared by modification of epoxy resin mortar with coal gasification ash in this paper. The experimental results shows that the addition of coal gasification ash reduces the mobility of mortar, but can greatly improve the mechanical properties of mortar.Compared with the standard epoxy resin mortar, the compressive strength of the modified mortar prepared by adding 40 % of the mass of epoxy resin increased by 74 % in 1 day and 33.3 % in 28 days. The increase of early compressive strength is beneficial to shorten the time of road repair working. At the same time, adding coal gasification slag reduced the shrinkage performance of the mortar. The microstructure of the mortar showed that the coal gasification ash increased the compactness of the mortar, reduced the hole in the mortar, and the crack was changed from continuous long strip to step, which indicated that the brittleness of the mortar was reduced.
引文
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[3]薛涛,许小东,石涛.改性环氧砂浆在水电站尾水锥管修补中的应用[J].水电与新能源, 2014(01):35-36+43.
[4]孙宇飞,张勇,韩练练.环氧砂浆在低温条件下修补水工建筑物的试验研究[J].水利水电技术, 2013, 44(09):73-75.
[5]应杰,张恒.环氧砂浆在寒区水工混凝土修补中的应用[J].黑龙江水利科技, 2009, 37(04):48-49.
[6]李维洲.环氧砂浆在隧洞衬砌混凝土质量缺陷处理中的应用[J].甘肃水利水电技术, 2012, 48(10):58-60.
[7]李昂.环氧砂浆在处理混凝土裂缝中的应用分析[J].河南建材,2011(02):123-124.
[8]高杰,胡高平,肖卫东.环氧砂浆在道路修复中的应用[J].粘接,2009, 30(06):74-75.
[9]陈钊庭,郭文瑛,黎华朝,等.填料物理性质对环氧树脂砂浆性能的影响[J].广东建材, 2010, 26(02):13-16.
[10]李智超,黄张洪.填料对环氧树脂混凝土力学性能影响[J].热固性树脂, 2003(05):16-17+21.
[11]周梅,刘书贤.填料品种和用量对树脂混凝土强度的影响[J].新型建筑材料, 2001(03):4-6.
[12]袁观明,李平和,李轩科,等.用SEM和FESEM研究碳纳米管/环氧树脂复合材料的拉伸断面[J].物理测试, 2006(02):1-5.
[2] Aniskevich K, Hristova J, Jansons J. Sorption characteristics of polymer concrete during long-term exposure to water[J]. Mech Compos Mater, 2003, 39:305-314.
[3]薛涛,许小东,石涛.改性环氧砂浆在水电站尾水锥管修补中的应用[J].水电与新能源, 2014(01):35-36+43.
[4]孙宇飞,张勇,韩练练.环氧砂浆在低温条件下修补水工建筑物的试验研究[J].水利水电技术, 2013, 44(09):73-75.
[5]应杰,张恒.环氧砂浆在寒区水工混凝土修补中的应用[J].黑龙江水利科技, 2009, 37(04):48-49.
[6]李维洲.环氧砂浆在隧洞衬砌混凝土质量缺陷处理中的应用[J].甘肃水利水电技术, 2012, 48(10):58-60.
[7]李昂.环氧砂浆在处理混凝土裂缝中的应用分析[J].河南建材,2011(02):123-124.
[8]高杰,胡高平,肖卫东.环氧砂浆在道路修复中的应用[J].粘接,2009, 30(06):74-75.
[9]陈钊庭,郭文瑛,黎华朝,等.填料物理性质对环氧树脂砂浆性能的影响[J].广东建材, 2010, 26(02):13-16.
[10]李智超,黄张洪.填料对环氧树脂混凝土力学性能影响[J].热固性树脂, 2003(05):16-17+21.
[11]周梅,刘书贤.填料品种和用量对树脂混凝土强度的影响[J].新型建筑材料, 2001(03):4-6.
[12]袁观明,李平和,李轩科,等.用SEM和FESEM研究碳纳米管/环氧树脂复合材料的拉伸断面[J].物理测试, 2006(02):1-5.
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