武汉现货供应弯钩型钢纤维报价

钢纤维检测编辑
1、钢纤维的抗拉强度检验，要求其抗拉强度不低于380MPa；
2、钢纤维的抗弯拆性能，钢纤维应能经受直径3㎜钢棒弯拆90°不断，每批次检验不少于10根；
3、杂质含量，钢纤维表面不得有油污，不得镀有有害物质或影响钢纤维与混凝土粘接的杂质；
4、钢纤维的长度偏差不应**过标准长度的10%，每批次至少随机抽查10根以上；
5、钢纤维的直径或等效直径合格率不得低于90%，可采取重量法检验，每批次抽检100根，用天平称量，卡尺测其长度，要求得到的等效平均值满足规定。
原材料的检验：
必须满足上述原材料的质量控制标准，应按照公路工程施工技术规范的要求进行检验。
钢纤维混凝土的检验：
应重点检验钢纤维混凝土的和易性、塌落度和水灰比等，同时必须现场目检钢纤维在混凝土的分布情况，发现有钢纤维结团现象应延长拌和时间。
Steel fiber inspection editor
1. The tensile strength test of steel fiber requires that the tensile strength shall not be less than 380MPa;
2. The bending and dismantling performance of steel fiber shall be able to withstand 90 ° continuous bending and dismantling of steel bar with diameter of 3mm, and no less than 10 pieces shall be inspected in each batch;
3. Impurity content: there shall be no oil stain on the surface of steel fiber, no harmful substances or impurities affecting the bonding between steel fiber and concrete;
4. The length deviation of steel fiber shall not exceed 10% of the standard length, and at least 10 pieces of steel fiber shall be randomly selected for each batch;
5. The qualified rate of steel fiber diameter or equivalent diameter shall not be less than 90%. Weight method can be adopted for inspection. 100 pieces of steel fiber can be sampled for each batch, weighed by balance and measured by caliper. The required equivalent average value meets the requirements.
Inspection of raw materials:
It must meet the quality control standards of the above raw materials, and shall be inspected in accordance with the requirements of the technical specifications for highway engineering construction.
Inspection of steel fiber reinforced concrete:
The workability, slump, water cement ratio, etc. of steel fiber concrete shall be mainly inspected. Meanwhile, the distribution of steel fiber in concrete shall be inspected visually on site. The mixing time shall be prolonged if steel fiber agglomeration is found.

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%。
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。

改善办法编辑
⒈改善基体对钢纤维的粘结性能；即改善混凝土基体，如采用更高强度混凝土。
⒉增加纤维的粘结长度；即增加长径比，公式中lf/df。

为增强砂浆或混凝土而加入的、长度和直径在一定范围内的细钢丝。常用截面为圆形的长直钢纤维，其长度为10～60毫米，直径为0.2～0.6毫米，长径比为30～100。为增加纤维和砂浆或混凝土的界面粘结，可选用各种异形的钢纤维，其截面有矩形、锯齿形、弯月形的；截面尺寸沿长度而交替变化的；波形的；圆圈状的；端部放大的或带弯钩的等。当使用截面非圆
形的钢纤维时，可按下式计算其当量直径（de)A fine steel wire of a certain length and diameter added to strengthen mortar or concrete. The common section is round long straight steel fiber, with length of 10-60mm, diameter of 0.2-0.6mm and length diameter ratio of 30-100. In order to increase the interface bonding between fiber and mortar or concrete, various shaped steel fibers can be selected, with rectangular, zigzag and crescent sections; cross section size alternates along the length; wave shape; circle shape; end enlarged or with hook, etc. When using non-circular section
The equivalent diameter (DE) of steel fiber can be calculated according to the following formula