High performance fiber concrete of C100 strength grade and preparation method thereof
A technology of high-performance fibers and strength grades, which is applied in the fields of high-strength, high-toughness and high-durability concrete, high-performance fiber concrete and its preparation. It can solve problems such as high brittleness, easy cracking, and poor durability, and achieve increased cohesion. properties, improve crack resistance, and improve mechanical properties
Active Publication Date: 2017-11-07
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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[0005] The object of the present invention is to provide a kind of high-performance fiber concrete of C100 intensity grade and preparation method thereof, the present invention uses cellulose fiber, rice husk ash, modified carbon nanotube, carboxylated styrene butadiene polymer, cement, fly ash for the first time , river sand, gravel, chemical admixtures (including water reducer, activator, defoamer), water to prepare a C100 strength grade with high volume stability, high toughness, high durability, and ultra-high strength Fiber high-performance concrete overcomes the shortcomings of ordinary concrete such as high brittleness, easy cracking, and poor durability
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preparation example Construction
[0071] There are two methods of concrete forming and curing in the preparation method used:
[0072] 1) Standard curing: Pour the concrete mixture into cast iron molds to form and vibrate, and let it stand for 1d-2d in a standard curing room with a temperature of 20°C±2°C and a relative humidity of ≥95%. Cultivate in the curing room until the desired age.
[0073] 2) Curing in water: pour the concrete mixture into a cast iron mold to form and vibrate, place it in an environment with a temperature of 20°C±2°C, cover the surface of the test block with a wet geotextile, let it stand for 1d, and remove the formwork. Then it is maintained to the required age in the pool of the standard curing room (in the pool is a saturated lime solution).
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The invention discloses high performance fiber concrete of C100 strength grade and a preparation method thereof. The concrete comprises the following components in parts by mass: 400-430 parts of cement, 120-130 parts of water, 710-730 parts of river sand, 1000-1030 parts of broken stones, 90-115 parts of coal ash, 50-80 parts of rice husk ash, 8-9 parts of a water reducer, 12-13 parts of an activator, 1.1-1.8 parts of cellulose fiber, 31-33 parts of a carboxylated styrene-butadiene polymer, 17-19 parts of hydroxyl modified carbon nanotube dispersion liquid, and 2.1-2.3 parts of an antifoaming agent. The concrete has high toughness and excellent durability, and bonding strength between the concrete and section steel is high. The product is applied to a section steel and concrete combined structure, cooperative work performance between section steel and concrete can be effectively performed, and deficiencies that bond property between section steel and concrete is bad as well as mechanical properties of section steel and concrete cannot be fully performed are compensated.
Description
technical field [0001] The invention belongs to the field of new building materials, and is a high-strength, high-toughness and high-durability concrete mixed with rice husk ash, cellulose fiber, carboxylated styrene-butadiene polymer and modified carbon nanotubes, and specifically relates to a concrete with high toughness High-performance fiber-reinforced concrete of C100 strength grade and preparation method thereof. Background technique [0002] Ordinary concrete and cement-based materials have low tensile strength and poor toughness, and a large number of micro-cracks will occur during hardening or under external loads, which seriously affect the durability of concrete or cement-based composite structures and reduce the service life of structures. In order to overcome the brittleness of ordinary concrete and high-performance concrete, asbestos fibers, steel fibers, carbon fibers, polyvinyl alcohol fibers, polypropylene fibers, and basalt fibers with toughening effects ar...
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Patent Timeline
Login to View More IPC IPC(8): C04B28/04C04B40/02
CPCC04B28/04C04B40/0286C04B2201/52C04B2201/50C04B14/06C04B14/02C04B18/101C04B18/08C04B22/124C04B22/147C04B24/122C04B24/383C04B2103/302C04B2103/50C04B24/24C04B14/026C04B14/068C04B18/24C04B24/2641C04B2103/10
Inventor 郑山锁宋明辰董方园龙立张晓辉张艺欣郑捷郑淏李强强蔡永龙刘巍周炎
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY