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哪些问题会导致钢纤维使用时带来不便
通过检查拌合物的和易性可直接反映拌合物施工质量控制的好坏。如果拌和物的塌度或维勃稠度以及粘聚性、保水性有较大的波动时,通常是拌和料出现配料错误或砂石含水率发生较大的波动所造成的。因经常在拌合机的出料口检查拌和料的和易性是钢纤维施工质量控制的一个重要环节。检查拌和料的水灰比,可以查知水灰比的变化情况,如果有较大的波动。要及时分析其原因并加以解决。还要检查拌和料中钢纤维是否分散均匀有无结团现象。测定钢纤维的体积含量及钢纤维的密度和含气量,以便发现问题及时加以解决。
The workability of mixtures can directly reflect the quality control of mixtures construction. When the slump or vitamin consistency of mixtures, cohesiveness and water retention fluctuate greatly, it is usually caused by mixing errors or large fluctuation of water content of sand and gravel. Often checking the workability of the mixing material at the outlet of the mixer is an important link in the quality control of steel fiber construction. Check the water-cement ratio of mixing material, we can find out the change of water-cement ratio, if there is a big fluctuation. The causes should be analyzed and solved in time. It is also necessary to check whether the steel fibers in the mixing material are evenly dispersed and whether there is agglomeration. The volume content, density and gas content of steel fibers are measured in order to find out the problems and solve them in time.
钢纤维有很好的抗裂功能,能够在发生裂缝以后起到防止裂缝的进一步扩散的作用,从而为施工单位争取更多的时间,减少不必要的危害。当钢纤维被破坏时,发现往往是钢纤维首先被拉断,但这并不是因为钢纤维抗拉强度不足,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,在搅拌过程中易被折断,反而会降低强化效果。因此,只要不是易脆断的钢材,通常强度较高的纤维可满足要求,当工程有特殊要求时,钢纤维抗拉强度可由需方根据技术与经济条件提出。
Steel fiber has a good crack resistance function, which can prevent the further spread of cracks after the occurrence of cracks, so as to gain more time for construction units and reduce unnecessary hazards. When steel fibers are destroyed, it is often found that steel fibers are first broken, but this is not due to the insufficient tensile strength of steel fibers, but due to the insufficient toughness of steel fibers. Therefore, the toughness of steel fibers should be improved. If the raw material is obtained by quenching or other quenching hardening methods, although its tensile strength has been improved, its texture is brittle and easy to be broken in the mixing process, which will reduce the strengthening effect. Therefore, as long as the steel is not brittle and fragile, the fiber with higher strength can meet the requirements. When the project has special requirements, the tensile strength of the steel fiber can be put forward by the demander according to the technical and economic conditions.
The workability of mixtures can directly reflect the quality control of mixtures construction. When the slump or vitamin consistency of mixtures, cohesiveness and water retention fluctuate greatly, it is usually caused by mixing errors or large fluctuation of water content of sand and gravel. Often checking the workability of the mixing material at the outlet of the mixer is an important link in the quality control of steel fiber construction. Check the water-cement ratio of mixing material, we can find out the change of water-cement ratio, if there is a big fluctuation. The causes should be analyzed and solved in time. It is also necessary to check whether the steel fibers in the mixing material are evenly dispersed and whether there is agglomeration. The volume content, density and gas content of steel fibers are measured in order to find out the problems and solve them in time.
钢纤维有很好的抗裂功能,能够在发生裂缝以后起到防止裂缝的进一步扩散的作用,从而为施工单位争取更多的时间,减少不必要的危害。当钢纤维被破坏时,发现往往是钢纤维首先被拉断,但这并不是因为钢纤维抗拉强度不足,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,在搅拌过程中易被折断,反而会降低强化效果。因此,只要不是易脆断的钢材,通常强度较高的纤维可满足要求,当工程有特殊要求时,钢纤维抗拉强度可由需方根据技术与经济条件提出。
Steel fiber has a good crack resistance function, which can prevent the further spread of cracks after the occurrence of cracks, so as to gain more time for construction units and reduce unnecessary hazards. When steel fibers are destroyed, it is often found that steel fibers are first broken, but this is not due to the insufficient tensile strength of steel fibers, but due to the insufficient toughness of steel fibers. Therefore, the toughness of steel fibers should be improved. If the raw material is obtained by quenching or other quenching hardening methods, although its tensile strength has been improved, its texture is brittle and easy to be broken in the mixing process, which will reduce the strengthening effect. Therefore, as long as the steel is not brittle and fragile, the fiber with higher strength can meet the requirements. When the project has special requirements, the tensile strength of the steel fiber can be put forward by the demander according to the technical and economic conditions.
