Low-shrinkage plastic concrete for high-speed rail bed damaged area backfilling, and preparation method thereof

• Main Authors: SONG XIAODONG, LI JIAN, CHEN SHANXIONG, YU FEI, GAO HONGTAO
• Format: Patent
• Language: English
• Published: 04.03.2015
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

The invention discloses a low-shrinkage plastic concrete for high-speed rail bed damaged area backfilling, and a preparation method thereof. The low-shrinkage plastic concrete comprises cement, aggregate, fly ash, bentonite, an expanding agent, a water reducer and an early strengthening agent according to a certain ratio. The preparation method comprises the following steps: 1, weighing sand, fly ash, cement, bentonite, the expanding agent, the water reducer and the early strengthening agent in proportion, wherein the total mass of all additives not exceed 5%; 2, mixing the raw materials in step 1, and uniformly stirring; and 3, weighing water in proportion, and pouring into the above obtained mixture while stirring to obtain the concrete with uniform dissolvability. The micro-shrinkage plastic concrete has the advantages of reasonable formula, use convenience, similar mechanical performances to those of high-speed rail bed, low shrinkage, strong cementing ability with drill hole walls, and good fluidity. The method has the advantages of easy implementation, simple operation, no need of a large machine, and suitableness for any field.