新闻动态
纤维产业怎样促进我国经济发展
钢纤维混凝土遭到破坏,发现往往是由于被拉断,但这并不是因为抗拉强度不足,而是因为其韧性不足造成的,因此,要提高其韧性.如果原材料通过淬火或其他急冷硬化方法获得,尽管其抗拉强度得到了提高,但质地较脆,在搅拌过程中容易折断,反而会降低强化效果.因此,只要不是采用易脆断的钢材,通常强度较高的纤维可满足要求.一般的抗拉强度不得低于380MPa.当工程有特殊要求时,抗拉强度可由需方根据技术与经济条件提出.主要是用在与混凝土的混合中,和水泥、砂石等共同搅拌,需要的时候可以加入化学试剂按一定比例配制而成.根据材质和生产工艺的不同在抗拉强度上有所区别.硬度较高,与混凝土搅拌时,不易弯折.浇筑在混凝土内部的,只要捣固密实,与空气隔绝,一般不发生锈蚀的现象.当使用的的体积率小到一定程度后则起不到增强的作用,所以一般以0.5%为最小体积率,超过2%后会造成质量变差,施工困难的后果.
Steel fiber reinforced concrete is often destroyed and found to be broken, but this is not due to insufficient tensile strength, but to its insufficient toughness. Therefore, it is necessary to improve its toughness. If raw materials are obtained by quenching or other quenching hardening methods, although their tensile strength has been improved, their texture is brittle, which is easy to break during mixing, but will reduce the strengthening effect. If it is not for brittle and fragile steel, the fibers with higher strength usually meet the requirements. The general tensile strength should not be less than 380 MPa. When the project has special requirements, the tensile strength can be put forward by the demander according to the technical and economic conditions. It is mainly used in mixing with concrete, mixing with cement, sand and stone, and adding chemical reagents in proportion when needed. According to the difference of material and production technology, there are differences in tensile strength. Hardness is higher, and it is not easy to bend when mixing with concrete. As long as the concrete is tampered densely and isolated from air, rust does not occur generally. When the volume ratio used is small to a certain extent, it will not play an enhanced role, so the minimum volume ratio is 0.5%, and the quality will deteriorate after exceeding 2%. The consequences of difficult construction.
Steel fiber reinforced concrete is often destroyed and found to be broken, but this is not due to insufficient tensile strength, but to its insufficient toughness. Therefore, it is necessary to improve its toughness. If raw materials are obtained by quenching or other quenching hardening methods, although their tensile strength has been improved, their texture is brittle, which is easy to break during mixing, but will reduce the strengthening effect. If it is not for brittle and fragile steel, the fibers with higher strength usually meet the requirements. The general tensile strength should not be less than 380 MPa. When the project has special requirements, the tensile strength can be put forward by the demander according to the technical and economic conditions. It is mainly used in mixing with concrete, mixing with cement, sand and stone, and adding chemical reagents in proportion when needed. According to the difference of material and production technology, there are differences in tensile strength. Hardness is higher, and it is not easy to bend when mixing with concrete. As long as the concrete is tampered densely and isolated from air, rust does not occur generally. When the volume ratio used is small to a certain extent, it will not play an enhanced role, so the minimum volume ratio is 0.5%, and the quality will deteriorate after exceeding 2%. The consequences of difficult construction.
