（中交一公局第七工程有限公司， 郑州 451452）

［摘要］为了探究水胶比、粉煤灰掺量、煤矸石掺量和玻璃纤维掺量对混凝土抗压、劈裂抗拉和抗裂性能的影响，设计了四因素四水平正交试验。分析结果表明：各因素对混凝土抗压强度影响程度为水胶比＞煤矸石体积比例＞粉煤灰质量浓度＞纤维质量浓度，粉煤灰掺量20%、纤维掺量0.1%时混凝土抗压强度达到最佳；各因素对混凝土劈裂抗拉强度影响程度为水胶比＞纤维质量浓度＞粉煤灰质量浓度＞煤矸石体积比例，粉煤灰掺量20%、纤维掺量0.2%时混凝土劈裂抗拉强度达到最佳；各因素对混凝土抗裂性能影响程度为纤维质量浓度＞水胶比＞粉煤灰质量浓度＞煤矸石体积比例，粉煤灰掺量30%、纤维掺量0.3%、煤矸石掺量15%时混凝土抗裂性能达到最佳。

［关键词］玻璃纤维；  煤矸石骨料混凝土；  抗压强度；  劈裂抗拉强度；  抗裂性能；  正交试验

中图分类号：TU528-572文献标识码：A文章编号：1002-848X(2020)13-0049-05

Experimental study on strength and crack resistance of coal gangue aggregate concrete mixed with glass fiber and fly ash

LI Wenlong

(The Seventh Engineering Co., Ltd. of CFHEC， Zhengzhou 451452， China)

Abstract:In order to explore the effects of water-binder ratio, fly ash content, coal gangue content and glass fiber content on concrete performance of compression, splitting tensile and crack-resistance, the four factors and four levels orthogonal test was designed. The results shows that the influence of each factor on the concrete compressive strength is water-binder ratio＞coal gangue volume ratio＞fly ash mass concentration＞fiber mass concentration, the concrete compressive strength is best when the content of fly ash is 20% and the fiber content is 0.1%. The influence of each factor on the concrete splitting tensile strength is water-binder ratio＞fiber mass concentration＞fly ash mass concentration＞coal gangue volume ratio, the concrete splitting tensile strength is best when the content of fly ash is 20% and the fiber content is 0.2%.The influence of each factor on the concrete crack-resistance is fiber mass concentration＞water-binder ratio＞fly ash mass concentration＞coal gangue volume ratio, the concrete crack-resistance is best when the content of fly ash is 30%,the fiber content is 0.3% and the coal gangue content is 15%.

Keywords:glass fiber; coal gangue aggregate concrete; compressive strength; splitting tensile strength; crack-resistance; orthogonal test

作者简介：李文龙，学士，工程师，Email:lwl519@163.com。