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Normal temperature curing reactive powder concrete and preparation method thereof

A technology of active powder and concrete, applied in the field of concrete, can solve the problems of limiting the size and shape of prefabricated components, increasing production costs, etc., and achieve the effects of long service life, reduced production costs, and small self-shrinkage

Active Publication Date: 2018-10-19
BEIJING ZHONGYANYI ENG TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The active powder concrete in the prior art needs to be cured by high-temperature steam for a long time (such as 80°C, 48h) to stimulate the activity of the material, so it can only be prefabricated in a factory with high-temperature steam curing equipment, and then installed on site
At the same time, the factory equipment limits the size and shape of the prefabricated components, and the high-temperature steam curing virtually increases the production cost

Method used

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  • Normal temperature curing reactive powder concrete and preparation method thereof
  • Normal temperature curing reactive powder concrete and preparation method thereof
  • Normal temperature curing reactive powder concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0027] The only difference from Example 1 is that the expansion agent is calcium oxide gypsum (category B) 30kg / m 3 .

Embodiment 3

[0029] The only difference from Example 1 is that the expansion agent is calcium sulfoaluminate CSA (category C) 30kg / m 3 .

Embodiment 4

[0040] Weighing and taking materials: Portland cement (Jidong Dunshi 52.5R cement, mineral composition is C 3 S5 1.8%, C 2 S 24.08%, C 3 A 7.0%, C 4 AF11.98%, specific surface area 448m 2 / kg, apparent density 3.15g / cm 3 )977kg / m 3 , high-strength admixture (active SiO 2 Mass ratio is 68%, CaO mass ratio is 20%, SO 3 The mass ratio is 8%, Al 2 o 3 Mass ratio is 1.6%) 246kg / m 3 , fine aggregates include quartz river sand and silica sand, of which quartz river sand (apparent density 2.71g / cm 3 , water absorption 0.11%) 271kg / m 3 , silica sand (apparent density 2.87g / cm 3 )747kg / m 3 , 34.57kg / m of polycarboxylate high-performance water reducer with a solid content of 22% 3 , non-ionic surfactant type defoamer 1.8kg / m 3 , calcium oxide expansion agent is 46kg / m 3 , steel fiber (tensile strength 2850MPA, aspect ratio 80, density 7.85g / cm3) volume content 1.75%, organic fiber (polypropylene fiber, density 0.91 / cm3, aspect ratio 450, bundled monofilament, elongation at...

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Abstract

The invention discloses normal-temperature maintenance-type active powder concrete and a preparation method thereof. Each cubic meter of the normal-temperature maintenance-type active powder concrete is prepared from 600-1600kg of cement, 400-2800kg of fine aggregate, 30-560kg of a high-strength admixture, 3-500kg of high tensile strength fibers, 0.4-45kg of organic fibers, 0.6-43.2kg of a water reducer (based on solid content), 0.06-43kg of an antifoaming agent, 6-129kg of an expanding agent and 100-430kg of water. The normal-temperature maintenance-type active powder concrete has superhigh strength and high toughness performances under the conditions of normal-temperature maintenance.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a normal temperature curing active powder concrete and a preparation method thereof. Background technique [0002] Fiber-reinforced reactive powder concrete (RPC) is a new type of cement-based composite material with high strength, high toughness, high durability, good volume stability and environmental performance. Due to its ultra-high strength and other excellent properties, it has become a new research and application hotspot in the field of international military facilities and civil construction engineering materials. [0003] In recent years, with the rapid development of the construction industry, concrete buildings have raised the need for lightweight and limited steel reinforcement. Coupled with the advent of reactive powder concrete with a compressive strength exceeding 150MPa, people have begun to challenge ultra-high-strength and high-toughness concrete. . At pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B28/04C04B16/06
Inventor 林志翔孙蓓桂志伟
Owner BEIJING ZHONGYANYI ENG TECH DEV CENT
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