内养护技术对高强混凝土性能的影响
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摘要
通过与外养护技术的对比,研究了内养护技术对混凝土强度、电通量及收缩的影响,结果表明温度对混凝土强度、耐久性能有影响,温度低不利于混凝土强度发展与耐久性提高,适宜的养护温度为20℃以上。针对混凝土强度的发展,内养护技术优于外养护剂养护,相比于养护膜养护和土工布包裹洒水养护效果稍差,采用SAP内养护对提高混凝土密实性没有优势。
Compared with external curing,this study focused on internal curing and its impact on the intensity,electric flux and shrinkage of concrete.The results show that temperature is a key factor to concrete intensity and durability,low temperature is detrimental to its intensity development and durability maintenance.Therefore,20 ℃ or above can be appropriate for the curing process.Moreover,internal curing is effective to improve concrete intensity when compared with external compound curing,but less effective when compared with membrane curing or geotextile/watering curing.In addition,the study proves that SAP internal curing shows no advantage on improving concrete intensity.
Compared with external curing,this study focused on internal curing and its impact on the intensity,electric flux and shrinkage of concrete.The results show that temperature is a key factor to concrete intensity and durability,low temperature is detrimental to its intensity development and durability maintenance.Therefore,20 ℃ or above can be appropriate for the curing process.Moreover,internal curing is effective to improve concrete intensity when compared with external compound curing,but less effective when compared with membrane curing or geotextile/watering curing.In addition,the study proves that SAP internal curing shows no advantage on improving concrete intensity.
引文
[1]马丽媛.高强混凝土收缩开裂的研究[D].北京:中国建筑材料科学研究院,2001.
[2]冷发光、王永海、周永祥,等.高强混凝土的研究应用和发展趋势[J].商品混凝土,2011(1):25-29.
[3]查进.超大跨径混合梁斜拉桥宽箱梁高性能混凝土防裂技术与耐久性研究[D].武汉:武汉理工大学,2008.
[4]谢伟峰、李丽娟、陈智泽等.高强混凝土高温下爆裂机理探讨[J].新型建筑材料,2007(1):70-72.
[5]董汇标,胡钊光,夏京亮,等.养护方式对天然火山灰高性能混凝土性能的影响[J].混凝土,2016(5):135-138.
[6]马先伟、张家科、刘剑辉.高性能水泥基材料内养护剂用高吸水树脂的研究进展[J].硅酸盐学报,2015(8):1099-1110.
[7]朱长华、李享涛、王保江,等.内养护对混凝土抗裂性及水化的影响[J].建筑材料学报,2013,16(2):221-225.
[8]陈德鹏,钱春香,高桂波,等.高吸水树脂对混凝土收缩开裂的改善作用及其机理[J].功能材料,2007,38(3):475-478.
[9]张子明、周红军、赵吉坤.温度对混凝土强度的影响[J].河海大学学报,2004(6):674-679.
[10]胡曙光,周宇飞,王发洲,等.高吸水性树脂颗粒对混凝土自收缩与强度的影响[J].华中科技大学学报,2008(3):1.
[2]冷发光、王永海、周永祥,等.高强混凝土的研究应用和发展趋势[J].商品混凝土,2011(1):25-29.
[3]查进.超大跨径混合梁斜拉桥宽箱梁高性能混凝土防裂技术与耐久性研究[D].武汉:武汉理工大学,2008.
[4]谢伟峰、李丽娟、陈智泽等.高强混凝土高温下爆裂机理探讨[J].新型建筑材料,2007(1):70-72.
[5]董汇标,胡钊光,夏京亮,等.养护方式对天然火山灰高性能混凝土性能的影响[J].混凝土,2016(5):135-138.
[6]马先伟、张家科、刘剑辉.高性能水泥基材料内养护剂用高吸水树脂的研究进展[J].硅酸盐学报,2015(8):1099-1110.
[7]朱长华、李享涛、王保江,等.内养护对混凝土抗裂性及水化的影响[J].建筑材料学报,2013,16(2):221-225.
[8]陈德鹏,钱春香,高桂波,等.高吸水树脂对混凝土收缩开裂的改善作用及其机理[J].功能材料,2007,38(3):475-478.
[9]张子明、周红军、赵吉坤.温度对混凝土强度的影响[J].河海大学学报,2004(6):674-679.
[10]胡曙光,周宇飞,王发洲,等.高吸水性树脂颗粒对混凝土自收缩与强度的影响[J].华中科技大学学报,2008(3):1.