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高效使用钢纤维的方式是什么
由于钢纤维两端带钩,容易在搅拌时结团或分布不均,进而影响工程质量。所以确保合理的配合比和搅拌工艺至关重要。地坪表面平整度误差要求在3毫米内,水平度要求高,如何控制面层的平整度是施工的另一个重点。
Because of the hooks at both ends of steel fibers, it is easy to agglomerate or distribute unevenly when stirring, which affects the quality of engineering. So it is very important to ensure reasonable mixing ratio and mixing process. The flatness error of the floor surface should be within 3 mm, and the level requirement is high. How to control the flatness of the surface is another key point of construction.
支模时用水平仪严格控制槽钢顶标高,在模板支设后用C30细石混凝土将槽钢下面填实,以免混凝土振捣时漏浆,影响混凝土强度。混凝土浇筑时应加强振捣。由于钢纤维会阻碍混凝土的流动,因此钢纤维混凝土的振捣要比普通混凝土的振捣时间长,一般应为普通混凝土的1.5倍。振捣时采用5米长的平板振动器（尽量避免使用插入式振动棒）将混凝土振捣密实直至出浆,用2米长刮尺和木抹子将混凝土表面混凝土浆抹平,误差控制在3毫米以内。
The top elevation of the channel steel is strictly controlled by the level instrument when supporting the formwork. After the formwork is supported, C30 fine stone concrete is used to fill the bottom of the channel steel, so as to avoid leakage of grout during concrete vibration and affect the strength of concrete. Vibration should be strengthened in concrete pouring. Because steel fiber will hinder the flow yamocao.37ix.com.cnqizhong.37ix.com.cnzhushe.37ix.com.cngeshengban.89ix.comof concrete, the tongfoxiang.71ix.comboligangjg.37ix.com.cnvibration time of steel fiber reinforced concrete is longer than that of ordinary concrete, which should be 1.5 times as long as that of ordinary concrete. When vibrating, the concrete is vibrated and compacted by a 5-meter-long plate vibrator (avoiding the use of inserting vibrating rods as far as possible) until the slurry is discharged. The concrete slurry on the concrete surface is smoothed by a 2-meter long scraper and a wooden plaster, and the error is controlled within 3 mm.
钢纤维地坪混凝土按柱距9米跨每4.5米宽浇注,在分仓混凝土浇注6～8天,并且其强度要达到12Mpa时切割缩缝。切割时沿纵向用切割机每隔9米切割平头缝。切割深度5毫米,缝宽3～5毫米,缝内嵌填柔性材料。
Steel fiber floor concrete is poured at 9 meters spacing and 4.5 meters wide. It is poured for 6 to 8 days in the sub-storehouse concrete, and its strength should reach 12 Mpa when cutting shrinkage joint. Cutting along the longitudinal direction with the cutting machine every 9 meters to cut flat seam. The cutting depth is 5 mm, the width of the seam is 3-5 mm, and the seam is filled with flexible material.
Because of the hooks at both ends of steel fibers, it is easy to agglomerate or distribute unevenly when stirring, which affects the quality of engineering. So it is very important to ensure reasonable mixing ratio and mixing process. The flatness error of the floor surface should be within 3 mm, and the level requirement is high. How to control the flatness of the surface is another key point of construction.
支模时用水平仪严格控制槽钢顶标高,在模板支设后用C30细石混凝土将槽钢下面填实,以免混凝土振捣时漏浆,影响混凝土强度。混凝土浇筑时应加强振捣。由于钢纤维会阻碍混凝土的流动,因此钢纤维混凝土的振捣要比普通混凝土的振捣时间长,一般应为普通混凝土的1.5倍。振捣时采用5米长的平板振动器（尽量避免使用插入式振动棒）将混凝土振捣密实直至出浆,用2米长刮尺和木抹子将混凝土表面混凝土浆抹平,误差控制在3毫米以内。
The top elevation of the channel steel is strictly controlled by the level instrument when supporting the formwork. After the formwork is supported, C30 fine stone concrete is used to fill the bottom of the channel steel, so as to avoid leakage of grout during concrete vibration and affect the strength of concrete. Vibration should be strengthened in concrete pouring. Because steel fiber will hinder the flow yamocao.37ix.com.cnqizhong.37ix.com.cnzhushe.37ix.com.cngeshengban.89ix.comof concrete, the tongfoxiang.71ix.comboligangjg.37ix.com.cnvibration time of steel fiber reinforced concrete is longer than that of ordinary concrete, which should be 1.5 times as long as that of ordinary concrete. When vibrating, the concrete is vibrated and compacted by a 5-meter-long plate vibrator (avoiding the use of inserting vibrating rods as far as possible) until the slurry is discharged. The concrete slurry on the concrete surface is smoothed by a 2-meter long scraper and a wooden plaster, and the error is controlled within 3 mm.
钢纤维地坪混凝土按柱距9米跨每4.5米宽浇注,在分仓混凝土浇注6～8天,并且其强度要达到12Mpa时切割缩缝。切割时沿纵向用切割机每隔9米切割平头缝。切割深度5毫米,缝宽3～5毫米,缝内嵌填柔性材料。
Steel fiber floor concrete is poured at 9 meters spacing and 4.5 meters wide. It is poured for 6 to 8 days in the sub-storehouse concrete, and its strength should reach 12 Mpa when cutting shrinkage joint. Cutting along the longitudinal direction with the cutting machine every 9 meters to cut flat seam. The cutting depth is 5 mm, the width of the seam is 3-5 mm, and the seam is filled with flexible material.
