The basic theory of steel fiber reinforced concrete is developed on the basis of reinforcing plastics in fibers and reinforcing metals. Due to the heterogeneity, multi-component and non-homogeneity of the composition and structure of steel fibers, and the "disorder" and "short" characteristics of steel fibers, it is much more complex than that of fiber reinforced plastics or reinforcing metals. How to make the reinforcing mechanism fully reflect its own characteristics? Sex is still being debated, perfected and developed.
钢纤维混凝土主要目的祇是为了与混凝土中之水泥、砂、碎石好好做结合而已,而有好的结合自然就有好的结果及效能.钢纤维不但可以有效的起到增强抗拉,抗剪,抗裂等能力外还有很好的抗腐蚀性.沿海地区海水浸蚀严重,所以在沿海地区修建工程一定会用到纤维制品的.钢纤维混凝土配合比设计的目的是将其组成材料,即钢纤维、水泥、水、粗细集料及外掺剂合理配合,使配制的钢纤维混凝土能够最大限度的满足施工和工程使用要求.使配制的钢纤维混凝土有较好的和易性,方便和满足施工要求.充分发挥钢纤维混凝土的特点,合理确定钢纤维及水泥用量,最大限度地降低工程成本.钢纤维的最大特点是既要保证良好的抗拉强度、断后伸长率、断面收缩率,对冶炼过程控制有严格要求.
The main purpose of steel fiber reinforced concrete is only to make good combination with cement, sand and gravel in concrete, and good combination will naturally have good results and effects. Steel fiber can not only effectively enhance tensile, shear and crack resistance, but also have good corrosion resistance. Seawater erosion in coastal areas is serious, so construction projects in coastal areas will certainly use fiber products. The purpose of mix proportion design of steel fiber reinforced concrete is to rationally mix its constituent materials, i.e. steel fiber, cement, water, coarse and fine aggregates and admixtures, so that the prepared steel fiber reinforced concrete can meet the requirements of construction and engineering use to the greatest extent, make the prepared steel fiber reinforced concrete have better workability, convenience and meet the construction requirements. Give full play to the characteristics of steel fiber reinforced concrete and make it reasonable and accurate. The biggest characteristic of steel fibers is to ensure good tensile strength, elongation after breaking and section shrinkage, and to strictly control the smelting process.
钢纤维体积率超过2%时,拌合物的和易性变差,施工较困难,质量难以保证.但在特殊需要时,经试验和采取必要的施工措施,在保证质量和增强效果的情况下,可将钢纤维体积率增大.根据国内外工程和应用经验,不同的钢纤维混凝土结构工程,常用体积率选用范围列于表1-2.选用时根据钢纤维的性能,结构对增强效果的要求,以及经济合理的原则选定.当钢纤维的性能较好或结构对增强要求较低时,可选用低值,结构对增强要求较高或钢纤维性能较差时可选高值.钢纤维的硬度主要表现在钢纤维混凝土在搅拌的时候不会出现弯折的现象,影响增强的效果.
When the volume ratio of steel fibers exceeds 2%, the workability of mixtures becomes worse, the construction is more difficult and the quality is difficult to guarantee. But when special needs arise, the volume ratio of steel fibers can be increased by testing and taking necessary construction measures to ensure the quality and reinforcement effect. According to the engineering and application experience lanqiujia.07858.netlanqiujiaa.07858.netbagan.07858.netwudaodiban.07858.netwutaidiban.07858.net
chenban.07858.netat home and abroad, the range of commonly used volume ratio is listed in Table 1-2. The hardness of steel fibers is mainly manifested in the fact that steel fibers do not bend when stirred, which affects the reinforcement of steel fibers concrete. When the performance of steel fibers is better or the requirement of structure for reinforcement is lower, the low value can be chosen and the high value can be chosen when the requirement of structure for reinforcement is higher or the performance of steel fibers is worse. The hardness of steel fibers is mainly manifested in the fact that steel fibers concrete will not bend when stirred. The effect.
