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简述钢纤维混凝土制造过程中的关键细节
钢纤维产品在使用过程中,搅拌是非常重要的一环,决定了最终纤维混凝土的所有理化性能.因此,必须以科学的方式进行搅拌才能最大深度地发挥纤维混凝土的性能,使之达到并超过设计要求. 在一般的纤维使用方面,无外于手工拌和、机器拌和两种.手工拌和一般在小的修补工程上,总的混凝土方量不会太多.所以,一般只要设法将钢纤维与混凝土完全均匀的搅拌即可。
In the process of using steel fiber products, mixing is a very important link, which determines all the physical and chemical properties of the final fiber concrete. Therefore, it is necessary to mix scientifically in order to maximize the performance of the fiber concrete and make it meet and exceed the design requirements. In the general use of fibers, there are no more than manual mixing and machine mixing. Manual mixing is generally small. In repairing engineering, the total volume of concrete will not be too much. So, in general, just try to mix steel fiber and concrete completely evenly.
钢纤维混凝土搅拌的投料次序和方法应以搅拌过程中钢纤维不产生结团和保证一定的生产率为原则,并通过试拌或根据经验确定。宜采用将钢纤维、水泥、粗细集料先干拌后加水湿拌的方法;也可采用纤维分散机在拌和过程中分散加入钢纤维。纤维混凝土的拌和时间应通过现场搅拌试验确定,并应比普通混凝土规定的纯拌和时间延长20-30s,采用先干拌后加水的搅拌方式时,干拌时间不宜少于lmin。
The order and method of steel fiber concrete mixing should be based on the principle that steel fiber does not produce agglomeration and ensure a certain productivity in the mixing process, and determined by trial mixing or experience. It is advisable to mix steel fibers, cement and coarse and fine aggregates dry before wet mixing, or to disperse steel fibers in the mixing process with a fiber disperser. The mixing time of fiber reinforced concrete should be determined by field mixing test, and it should be 20-30 seconds longer than the pure mixing time stipulated by ordinary concrete. When using the mixing method of dry mixing before adding water, the dry mixing time should not be less than lmin.
钢纤维混凝土的稠度可参与同类工程对普通混凝土所要求的稠度来确定,其塌落度值可比相应普通混凝土要求值小20mm,其维勃稠度值与相应普通混凝土要求值相同。缩缝为平头缝构造的纤维混凝土层兼面层在垫层下没有铺灰土等地基加强并同时符合下列条件时:拆减前垫层兼面层厚度不小于130cm;地基加强层的厚度大于垫层厚度,其厚度可秉于拆减系数0.75, 但不得小于50cm.
The consistency of steel fiber reinforced concrete can be used to determine the required consistency of ordinary concrete in similar projects. The collapse value of steel fiber reinforced concrete is 20 mm smaller than that of corresponding ordinary concrete, and its Vibro consistency value is the same as that songjiaoyou.07858.net diandongm.89ix.comfangdaomenw.89ix.com fengmao.89ix.comjialouyi.89ix.comtiaojiefad.89ix.comof corresponding ordinary concrete. When the fiber reinforced concrete layer with shrinkage joints is not reinforced by lime-soil under the cushion and meets the following conditions at the same time: the thickness of the cushion layer is not less than 130 cm before the removal; the thickness of the foundation strengthening layer is greater than the thickness of the cushion layer, and its thickness can be equal to the removal coefficient of 0.75, but not less than 50 cm.
In the process of using steel fiber products, mixing is a very important link, which determines all the physical and chemical properties of the final fiber concrete. Therefore, it is necessary to mix scientifically in order to maximize the performance of the fiber concrete and make it meet and exceed the design requirements. In the general use of fibers, there are no more than manual mixing and machine mixing. Manual mixing is generally small. In repairing engineering, the total volume of concrete will not be too much. So, in general, just try to mix steel fiber and concrete completely evenly.
钢纤维混凝土搅拌的投料次序和方法应以搅拌过程中钢纤维不产生结团和保证一定的生产率为原则,并通过试拌或根据经验确定。宜采用将钢纤维、水泥、粗细集料先干拌后加水湿拌的方法;也可采用纤维分散机在拌和过程中分散加入钢纤维。纤维混凝土的拌和时间应通过现场搅拌试验确定,并应比普通混凝土规定的纯拌和时间延长20-30s,采用先干拌后加水的搅拌方式时,干拌时间不宜少于lmin。
The order and method of steel fiber concrete mixing should be based on the principle that steel fiber does not produce agglomeration and ensure a certain productivity in the mixing process, and determined by trial mixing or experience. It is advisable to mix steel fibers, cement and coarse and fine aggregates dry before wet mixing, or to disperse steel fibers in the mixing process with a fiber disperser. The mixing time of fiber reinforced concrete should be determined by field mixing test, and it should be 20-30 seconds longer than the pure mixing time stipulated by ordinary concrete. When using the mixing method of dry mixing before adding water, the dry mixing time should not be less than lmin.
钢纤维混凝土的稠度可参与同类工程对普通混凝土所要求的稠度来确定,其塌落度值可比相应普通混凝土要求值小20mm,其维勃稠度值与相应普通混凝土要求值相同。缩缝为平头缝构造的纤维混凝土层兼面层在垫层下没有铺灰土等地基加强并同时符合下列条件时:拆减前垫层兼面层厚度不小于130cm;地基加强层的厚度大于垫层厚度,其厚度可秉于拆减系数0.75, 但不得小于50cm.
The consistency of steel fiber reinforced concrete can be used to determine the required consistency of ordinary concrete in similar projects. The collapse value of steel fiber reinforced concrete is 20 mm smaller than that of corresponding ordinary concrete, and its Vibro consistency value is the same as that songjiaoyou.07858.net diandongm.89ix.comfangdaomenw.89ix.com fengmao.89ix.comjialouyi.89ix.comtiaojiefad.89ix.comof corresponding ordinary concrete. When the fiber reinforced concrete layer with shrinkage joints is not reinforced by lime-soil under the cushion and meets the following conditions at the same time: the thickness of the cushion layer is not less than 130 cm before the removal; the thickness of the foundation strengthening layer is greater than the thickness of the cushion layer, and its thickness can be equal to the removal coefficient of 0.75, but not less than 50 cm.
