Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low-slump loss concrete and preparation method thereof

A technology of slump loss and concrete, which is applied in the field of concrete, can solve the problems of concrete compression resistance, shrinkage, flexural resistance, wear resistance, reduction of concrete strength, and reduction of bond strength between cement and sandstone, etc., to achieve Improve anti-abrasion performance, reduce adsorption, and reduce impurities

Inactive Publication Date: 2020-01-10
上海浦盈混凝土有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the soil content in sand and gravel is high, the bond strength between cement and sand and gravel will be reduced, which will lead to adverse effects on the properties of concrete such as compression resistance, shrinkage, flexural resistance, and wear resistance, which will greatly reduce the strength of concrete.

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
  • Low-slump loss concrete and preparation method thereof
  • Low-slump loss concrete and preparation method thereof
  • Low-slump loss concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: A kind of low slump loss concrete, each component and its corresponding parts by weight are as shown in Table 1, and are prepared through the following steps:

[0055] Step 1, preparation of admixture: put isopropanol and water into the reaction kettle, stir and mix evenly, raise the temperature to 85°C, add acrylic acid and sodium persulfate dropwise at the same time, complete the dropwise addition within 1.5h, keep warm for 2h, and drop to 25°C and adjust the pH to 9 with a 30% NaOH solution to obtain;

[0056] Step 2, mixing and stirring fly ash, sandstone, crushed stone, clay and bentonite evenly to obtain a mixture;

[0057] Step 3, mixing and stirring the mixture obtained in step 2 with cement, 75% water, polycarboxylate water reducer and admixture;

[0058] Step 4: Mix and stir the mixture obtained in Step 3 with the remaining water and glass fiber evenly to obtain low slump loss concrete.

[0059]In step one, the weight ratio of Virahol, water, i...

Embodiment 2-6

[0063] Example 2-6: a low slump loss concrete, the difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0064] Each component and parts by weight thereof in table 1 embodiment 1-6

[0065]

Embodiment 7

[0066] Example 7: A method for preparing low slump loss concrete, the difference from Example 1 is that in step 1, the admixture is prepared: put isopropanol and water into the reaction kettle, stir and mix evenly, and heat up To 90°C, add acrylic acid and sodium persulfate dropwise at the same time, the dropwise addition is completed within 2 hours, keep the temperature for 2 hours, lower to 25°C and adjust the pH to 11 with 30% NaOH solution to obtain the product.

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
aspect ratioaaaaaaaaaa
aspect ratioaaaaaaaaaa
aspect ratioaaaaaaaaaa
Login to View More

Abstract

Relating to the technical field of concrete, the invention discloses a low-slump loss concrete and a preparation method thereof. According to technical key points, the low-slump loss concrete comprises the following components by weight: 24-42 parts of cement; 7-10 parts of fly ash; 90-100 parts of sandstone; 95-110 parts of gravel; 9-10 parts of clay; 19-21 parts of water; 0.48-0.84 part of bentonite; 0.4-0.8 part of a polycarboxylate superplasticizer; 0.01-0.02 part of an admixture; and 0.15-0.2 part of glass fiber; wherein the admixture is prepared by the steps of: adding isopropanol and water into a reaction kettle, mixing the substances uniformly, performing heating, adding acrylic acid and an initiator dropwise at the same time, then carrying out heat preservation reaction for 2h, performing cooling to 25DEG C, and using a NaOH solution with a mass fraction of 30% to adjust the pH to 9-11. The concrete prepared according to the formula provided by the invention has the advantagesof small slump loss and high strength.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to a low slump loss concrete and a preparation method thereof. Background technique [0002] Due to the rapid development of the construction, road and bridge industries, the consumption of concrete raw materials is huge, and natural high-quality sand and gravel are in short supply. In many areas, sand and gravel are excavated from mountains or rivers with high mud content, resulting in low-quality sand with high mud content. Stones are increasing. If the sand and gravel with high mud content are not pretreated, it will have a great impact on the workability, later strength and structural stability of concrete. [0003] When the soil content in sand and gravel is high, the fluidity of concrete decreases sharply, and the slump loss is very fast. In addition, when the soil content in sand and gravel is high, the bond strength between cement and sand and gravel will ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C08F220/06C08F220/56
CPCC04B28/02C08F220/06C08F220/56C04B2201/50C04B18/08C04B14/02C04B14/06C04B14/10C04B14/104C04B2103/302C04B14/42C04B24/26C04B24/2652
Inventor 宋凤雅
Owner 上海浦盈混凝土有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com