High-toughness bridge deck pavement fibre concrete and preparation method thereof

Abstract

The invention discloses high-toughness bridge deck pavement fibre concrete and a preparation method thereof. The high-toughness bridge deck pavement fibre concrete is prepared from the following components in parts by weight: 470 to 490 parts of cement, 800 to 820 parts of sand, 535 to 555 parts of rough stones, 350 to 370 parts of fine stones, 4.7 to 6.7 parts of imitation steel fibres, 1.5 to 3.5 parts of a polycarboxylate superplasticizer and 155 to 175 parts of water. The high-toughness bridge deck pavement fibre concrete has the advantages that the performance is excellent; the flexural toughness index I5 of the high-toughness bridge deck pavement fibre concrete is 2.7 times that of plain concrete; the fatigue strength is improved by 7.2 percent compared with that of the plain concrete; the splitting tensile strength is improved by 16.6 percent; the compressive strength of the concrete is not affected. The durability is improved; the high-toughness bridge deck pavement fibre concrete is particularly suitable for a concrete structure, which is exposed in natural environment for a long time and is greatly influenced by the environment, such as a bridge deck.

Description

technical field [0001] The invention relates to a high toughness bridge deck pavement fiber concrete and a preparation method thereof. Background technique [0002] Synthetic fibers in the prior art include: polypropylene (PP) fiber, polyethylene (PE) fiber, polyamide (nylon / nylon, PA) fiber, polyacrylonitrile (acrylic, PAN) fiber, polyester (polyester, PET) Fiber, polyvinyl alcohol (vinylon, PVA) fiber, etc., because the bridge deck pavement concrete is in a bending state all the year round, the concrete material in the bending moment area is under tension for a long time, and the current bridge deck pavement fiber concrete generally has a large volume, and the dosage High, workability is not good, construction is difficult, and there are durability problems that cannot be ignored. Contents of the invention [0003] In view of this, the main purpose of the present invention is to provide a high toughness bridge deck pavement fiber concrete, which can increase the splitti...

AI Technical Summary

Problems solved by technology

[0002] Synthetic fibers in the prior art include: polypropylene (PP) fiber, polyethylene (PE) fiber, polyamide (nylon / nylon, PA) fiber, polyacrylonitrile (acrylic, PAN) fiber, polyester (polyester, PET) Fiber, polyvinyl alcohol (vinylon, PVA) fiber, etc., because the bridge deck pavement concrete is in a bending state all the year round, and the concrete material in the bending moment area is under tension for a long time, but the current bridge deck pavement fiber concrete generally has a large volume, and the dosage High, workability is not good, construction is difficult, and there are durability problems that cannot be ignored