Concrete prefabricated bridge deck with plasticizer

Abstract

A manufacture method of a concrete prefabricated bridge deck with a plasticizer is characterized by comprising the specific steps: weighing concrete materials (by mass) of 40-50 parts of cement, 3-10parts of silica fume, 5-7 parts of carbide slag, 3-5 parts of steel slag, 30-40 parts of sand, 40-50 parts of crushed stone, 10-20 parts of water, and 3-4 parts of the plasticizer; adding the cement,silica fume, carbide slag, steel slag and water into a mixer, mixing, adding sand, crushed stone and the plasticizer, and continuing to mix well to obtain concrete. The concrete prefabricated bridge deck has a water retention rate of 90.4-93.2%, 28-day shrinkage of 0.102-0.116%, initial setting time of 200-210 min, final setting time of 370-390 min, one-day compressive strength of 20.5-22.4 MPa, 7-day compressive strength of 34.5-36.1 MPa, 28-day compressive strength of 47.5-49.2 MPa, and 14-day tensile strength of 1.86-1.93 MPa. The method provides significantly extended initial and final setting time and evidently improved compressive strength and tensile strength for the prior concrete, with shrinkage evidently reduced.

Description

technical field [0001] The invention relates to a concrete prefabricated bridge panel with a plasticizer, belonging to the technical field of bridge panels. Background technique [0002] In modern bridge panels, concrete is an important part of bridge panels. With the rapid development of infrastructure such as modern railways and highways, and advocating the strategic principles of energy saving, emission reduction, low-carbon economy, green environmental protection and sustainable development, bridge panels Higher technical requirements are put forward for strength. The performance of basic materials in different natural environments cannot meet the requirements of modern construction technologies. Pumping agents, preservatives, rust inhibitors, waterproofing agents, anti-cracking agents, airtight agents, anti-corrosion agents, Alkali aggregate activity inhibitor, antifreeze, water retention, thickening stabilizer, fiber and more than ten kinds of products meet its techni...

AI Technical Summary

Problems solved by technology

The performance of basic materials in different natural environments cannot meet the requirements of modern construction technologies. Pumping agents, preservatives, rust inhibitors, waterproofing agents, anti-cracking agents, air-tight agents, anti-corrosion agents, Alkali aggregate activity inhibitor, antifreeze agent, water retention, thickening stabilizer, fiber and more than ten kinds of products meet its technical quality requirements, which will not only make the construction process cumbersome, but also significantly increase the cost