| 钢纤维是一种新、高性能的钢纤维品种 |
| 添加时间：2018/4/21 16:55:23 浏览次数： |
| 钢纤维是一种新、高性能的钢纤维品种。钢纤维道路的配合比设计方法大体与普通混凝土相同，不同点为：强度双控标准（抗压强度和弯拉强度）；钢纤维掺量根据设计要求的弯拉强度确定；单位用水量和砂率与纤维掺量有关，每掺加0.5%（体积率）钢纤维，单位用水量增加6kg，砂率增大2%。 Steel fiber is a new and high performance steel fiber variety. The mix design method of the steel fiber road is roughly the same as ordinary concrete, different points are: strength double control standard (compressive strength and flexural strength); steel fiber content is determined according to the flexural strength required by the design; the unit water consumption and sand rate are related to the amount of fiber, each addition of 0.5% (volume ratio) steel fiber, unit water use. The amount of sand increased by 6kg, and the sand rate increased by 2%. 钢纤维混凝土具有与普通混凝土一样的搅拌、运转和施工性能，纤维在混凝土中不会结球，分布均匀，可在商品混凝土搅拌站进行生产并能用于泵送施工。铣削钢纤维混凝土的早期坍落度损失较大，30分钟损失32%，2小时损失42%。钢纤维混凝土的实际工作性优于相同的坍落度的普通混凝土。钢纤维混凝土具有良好的材料性能，与普通混凝土相比，其抗压强度提高2～20%；弯拉强度提高20～50%；劈裂抗拉强度提高20～40%；耐磨性能提高40%左右，其物理力理性能完全可以满足城市道路工程及检查井盖等配套构件需求技术指标。钢纤维粗糙而洁净的表面，能与混凝土中的水泥浆体牢固的结合，这是铣削钢纤维提高混凝土各种性能的根本原因。 The steel fiber reinforced concrete has the same mixing, operation and construction performance as ordinary concrete. The fiber will not form the ball in the concrete. It can be distributed evenly in the concrete mixing station and can be used for pumping construction. The early slump loss of milling steel fiber reinforced concrete is larger, the loss of 30 minutes is 32%, and the loss of 2 hours is 42%. The actual workability of steel fiber reinforced concrete is better than that of ordinary concrete with slump. Steel fiber reinforced concrete has good material properties. Compared with ordinary concrete, its compressive strength is increased by 2 to 20%, flexural tensile strength is raised by 20 to 50%, splitting tensile strength is increased by 20 to 40%, and wear resistance is raised about 40%. The physical and physical properties of the concrete can fully meet the requirement technology of urban road engineering and inspection shaft cover and other supporting components. Indicators. The rough and clean surface of steel fiber can be firmly combined with the cement slurry in the concrete, which is the fundamental reason for the milling steel fiber to improve the various properties of the concrete. |
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