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怎样能避免钢纤维发生结团
钢纤维混凝土抗拉、抗弯、抗裂及耐磨、耐冲击、耐疲劳、韧性等性能相比普通混凝土都有显着提高,可使桥面减薄,缩缝间距加大,改善桥面的使用性能,延长桥面使用寿命,缩短施工工期。如为防止钢纤维混凝土在搅拌时纤维结团,在施工时每拌一次的搅拌量不宜大于搅拌机额定搅拌量的80%;一旦发现有纤维结团,就必须剔除掉;有锈蚀、易结块的钢纤维不得使用,以防止因此而影响混凝土的质量;严格按照规范要求对原材料和施工质量进行试验和检验,不宜雨天施工。施工中遇阵雨应立即停止施工,及时覆盖未硬化的混凝土等,以供同行借鉴。
Compared with ordinary concrete, steel fiber reinforced concrete has remarkable improvement in tensile, bending, crack resistance, wear resistance, impact resistance, fatigue resistance and toughness, which can make the bridge deck thinner, increase the shrinkage joint spacing, improve the performance of the bridge deck, prolong the service life of the bridge deck and shorten the construction period. For example, in order to prevent fiber agglomeration of steel fiber concrete in mixing, the mixing amount should not be greater than 80% of the rated mixing amount of the mixer in construction; once the fiber agglomeration is found, it must be removed; steel fibers with rust and easy agglomeration should not be used in order to prevent the quality of concrete from being affected; raw materials and construction quality should be tested and tested strictly in accordance with the specifications, and it is not appropriate. Construction on rainy days. The construction should be stopped immediately in case of shower, and the unhardened concrete should be covered in time for the reference of colleagues.
为使钢纤维较均匀地分散于砂浆或混凝土中,并增大纤维的长径比,可使用由水溶性胶粘结在一起成集束状的纤维。钢纤维可用冷拔钢丝切断、薄钢板剪切、钢块或钢锭铣削以及熔钢抽纱等方法制造。配制常温下应用的纤维混凝土,可使用低碳钢纤维;而配制耐火的纤维混凝土,则必须使用不锈纤维。砂浆或混凝土中掺加适量的纤维,可提高其抗拉、抗弯强度,并大幅度地提高其韧性和抗冲击强度。
In order to make the steel fibers more evenly dispersed in mortar or concrete and increase the ratio of length to diameter of the fibers, cluster fibers can be bonded together by water-soluble cements. caiguangwa.89ix.comdipinh.89ix.comdipingg.89ix.comzhusuji.89ix.comceshi.89ix.commend.89ix.comSteel fibers can be manufactured by cutting cold-drawn steel wires, shearing thin steel plates, milling steel blocks or ingots, and drawing of molten steel. Low carbon steel fibers can be used in the preparation of fibre reinforced concrete at room temperature, while stainless fibers must be used in the preparation of refractory fibre reinforced concrete. Adding appropriate amount of fibers in mortar or concrete can improve its tensile and flexural strength, and greatly improve its toughness and impact strength.
Compared with ordinary concrete, steel fiber reinforced concrete has remarkable improvement in tensile, bending, crack resistance, wear resistance, impact resistance, fatigue resistance and toughness, which can make the bridge deck thinner, increase the shrinkage joint spacing, improve the performance of the bridge deck, prolong the service life of the bridge deck and shorten the construction period. For example, in order to prevent fiber agglomeration of steel fiber concrete in mixing, the mixing amount should not be greater than 80% of the rated mixing amount of the mixer in construction; once the fiber agglomeration is found, it must be removed; steel fibers with rust and easy agglomeration should not be used in order to prevent the quality of concrete from being affected; raw materials and construction quality should be tested and tested strictly in accordance with the specifications, and it is not appropriate. Construction on rainy days. The construction should be stopped immediately in case of shower, and the unhardened concrete should be covered in time for the reference of colleagues.
为使钢纤维较均匀地分散于砂浆或混凝土中,并增大纤维的长径比,可使用由水溶性胶粘结在一起成集束状的纤维。钢纤维可用冷拔钢丝切断、薄钢板剪切、钢块或钢锭铣削以及熔钢抽纱等方法制造。配制常温下应用的纤维混凝土,可使用低碳钢纤维;而配制耐火的纤维混凝土,则必须使用不锈纤维。砂浆或混凝土中掺加适量的纤维,可提高其抗拉、抗弯强度,并大幅度地提高其韧性和抗冲击强度。
In order to make the steel fibers more evenly dispersed in mortar or concrete and increase the ratio of length to diameter of the fibers, cluster fibers can be bonded together by water-soluble cements. caiguangwa.89ix.comdipinh.89ix.comdipingg.89ix.comzhusuji.89ix.comceshi.89ix.commend.89ix.comSteel fibers can be manufactured by cutting cold-drawn steel wires, shearing thin steel plates, milling steel blocks or ingots, and drawing of molten steel. Low carbon steel fibers can be used in the preparation of fibre reinforced concrete at room temperature, while stainless fibers must be used in the preparation of refractory fibre reinforced concrete. Adding appropriate amount of fibers in mortar or concrete can improve its tensile and flexural strength, and greatly improve its toughness and impact strength.
