Check patentability & draft patents in minutes with Patsnap Eureka AI!

Anti-crack enhanced large-volume super-length structural concrete and preparation method thereof

A concrete and super-long technology, which is applied in the field of crack-resistant reinforced large-volume super-long structural concrete and its preparation, can solve problems such as strengthening mineral powder and fly ash hydration, large-volume super-long structural concrete cracks, etc., to achieve increased The workability of cement, the effect of improving compactness and impermeability, and reducing the amount of cement

Inactive Publication Date: 2017-12-08
北京铁建永泰新型建材有限公司
View PDF1 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the actual production process, the Ca(OH) precipitated from cement 2 When mixed with slag powder and fly ash, it will strengthen the hydration of slag powder and fly ash, and it will still cause cracks in large-volume super-long structural concrete due to high temperature rise

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-crack enhanced large-volume super-length structural concrete and preparation method thereof
  • Anti-crack enhanced large-volume super-length structural concrete and preparation method thereof
  • Anti-crack enhanced large-volume super-length structural concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] Components and proportioning ratios in each embodiment are shown in Table 2.

[0045] Table 2 Components and proportions of anti-cracking reinforced large-volume super-long structure concrete in each embodiment

[0046]

[0047] Among them, according to the "GB / T14685-2011" to detect the nature of the crushed stone, the apparent density of the crushed stone is 2820kg / m 3,The continuous gradation of crushed stones has a loose packing porosity of 43%; the alkali-aggregate reaction in the concrete is tested, and the expansion rate is 0.04% in 14 days, and the loose packing density is 1600kg / m 3 .

[0048] The preparation method of the anti-cracking reinforced large-volume super-long structure concrete of the above embodiment one to embodiment seven is as follows:

[0049] (1) According to the ratio in Table 2, the water reducer and water are pre-mixed and stirred to form an admixture solution, and the stirring speed is 800r / min;

[0050] (2) Make the machine-made san...

Embodiment 6

[0067] The bulk density of the concrete that embodiment six and embodiment seven make is 2400kg / m 3 , sand rate is 0.38. Cement, fly ash, slag, water reducer and water in test embodiment six and embodiment seven are mixed to form the heat release of bulky cementitious material when the test ends (72h), and the temperature rise value of prediction concrete is as table 4.

[0068] The heat release and temperature rise value of the concrete that table 4 embodiment six and embodiment seven make

[0069]

[0070]

[0071] It can be seen from the above results that when the amount of mineral admixtures (fly ash and mineral powder) replacing cement increases, the temperature rise of concrete is small.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Apparent densityaaaaaaaaaa
Slumpaaaaaaaaaa
Densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to an anti-crack enhanced large-volume super-length structural concrete and a preparation method thereof. The anti-crack enhanced large-volume super-length structural concrete contains the following components in parts by weight: 200-220 parts of cement, 158-170 parts of water, 760-775 parts of medium sand, 1050-1070 parts of macadam, 90-95 parts of coal ash, 60-65 parts of mineral powder, 35-45 parts of a swelling agent and 7-9 parts of a water reducer. The preparation method comprises the following steps: mixing the water reducer with water, so as to obtain an additive solution; mixing the macadam with the medium sand, and uniformly stirring, so as to obtain an aggregate mixture; mixing the cement, the coal ash, the mineral powder and the swelling agent, and uniformly stirring, so as to obtain a rubber material mixture; and mixing the aggregate mixture, the rubber material mixture and the additive solution, and uniformly stirring, so as to obtain the anti-crack enhanced large-volume super-length structural concrete. The anti-crack enhanced large-volume super-length structural concrete prepared by virtue of the formula and the preparation method has the characteristics of being low in hydration heat, capable of resisting heat and high in strength.

Description

technical field [0001] The invention relates to a large-volume concrete, more specifically, it relates to a crack-resistant reinforced large-volume super-long structure concrete and a preparation method thereof. Background technique [0002] my country's "Code for Construction of Mass Concrete" GB50496-2009 stipulates that the minimum geometric size of the concrete structure is not less than 1m, or it is expected to cause harmful cracks due to temperature changes and shrinkage caused by the hydration of the cementitious material in the concrete. The resulting concrete is called mass concrete. [0003] Large-volume concrete construction is commonly used in modern buildings, such as the foundation of high-rise buildings, large-scale equipment foundations, water conservancy dams, etc. Due to its large size, the release of cement hydration heat is relatively concentrated, and the internal temperature rises relatively quickly. When the temperature difference between the inside an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/20C04B2111/343C04B2201/50C04B14/06C04B14/02C04B18/08C04B18/141C04B22/14C04B2103/302
Inventor 韩小华王玉鹏何洪亮吴冬张磊霍红辉李建立周士兵何齐王兰石春悦邱雪
Owner 北京铁建永泰新型建材有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com