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

Steel slag sand-straw ash co-doped mortar and preparation method thereof

A technology of straw ash and steel slag sand is applied in the field of thermal insulation mortar, which can solve the problems of strong random uncertainty, excessive time-consuming, volume expansion, etc., and achieves the effect of good utilization prospect and cost saving.

Active Publication Date: 2018-09-11
江苏鼎诺建筑科技有限公司
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mortar has the function of heat preservation, it has the following defects: the requirement of the mortar for the steel slag raw material is "age the steel slag for one year, so that the free CaO is less than 3%", which not only takes too long, but also has low production efficiency and wastes the land resources, random uncertainty is strong; moreover, the gel activity of steel slag has basically disappeared after being placed for one year, and the strength of the obtained mortar can only reach 0.18MPa
Although the above-mentioned mortar has adopted industrial waste steel slag sand, which reduces the pollution of the steel slag to the environment, and the prepared mortar has the function of heat preservation, there are still the following problems: because the steel slag contains a certain amount of free calcium oxide and free magnesium oxide, so , capable of chemically reacting with water and carbon dioxide to produce volume expansion
Therefore, straw ash can accelerate the hydration of cement, and C-S-H gel has higher strength, which can improve the early strength of mortar; but the effective active content of straw ash is much less than that of cement, which will cause its later strength to decrease, and straw ash mixed with When the amount is too large, a large amount of potassium salt and magnesium salt will be dissolved in water and dispersed in the cementitious material, which will crystallize with age and cause "salting out" phenomenon, which seriously affects the durability of concrete
Therefore, in order to avoid the poor durability of concrete, the amount of straw ash needs to be strictly controlled, resulting in the amount of straw ash used in this technical solution is only 1.67%-1.75% of cement, which cannot achieve the effect of "recycling waste".

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
  • Steel slag sand-straw ash co-doped mortar and preparation method thereof
  • Steel slag sand-straw ash co-doped mortar and preparation method thereof
  • Steel slag sand-straw ash co-doped mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The steel slag sand-straw ash composite mortar in this implementation includes the following raw materials in parts by weight: 5 parts of cement; 35 parts of river sand; 60 parts of steel slag sand; 10 parts of straw ash; 20 parts of fiber;

[0033] In order to understand the specific chemical composition and content of the steel slag sand, the present embodiment has carried out component testing to the steel slag sand, and the results are as follows:

[0034] The composition detection result of steel slag sand described in table 1

[0035] Element

SiO 2

Al 2 o 3

CaO

FeO

MgO

S

content(%)

9.76

2.29

37.25

7.23

7.67

0.11

Element

MnO

P 2 o 5

M.Fe

f—CaO

T.Fe

——

content(%)

3.18

0.95

0.28

3.95

24.11

——

[0036] Wherein, the particle size of the steel slag sand is 4.75mm, and the apparent density is 3629Kg / m 3 , the fineness modulus is 3.6, and the mud...

Embodiment 2

[0053] The steel slag sand-straw ash composite mortar in this implementation includes the following raw materials in parts by weight: 30 parts of cement; 20 parts of river sand; 40 parts of steel slag sand; 1 part of straw ash; 1 part of fiber; 0 part of mortar admixture.

[0054] The preparation method of the steel slag sand-straw ash composite mortar is as follows: take cement, river sand, steel slag sand, straw ash, and fiber in parts by weight, and mix them evenly to obtain the product.

Embodiment 3

[0056] The steel slag sand-straw ash mixed mortar in this implementation includes the following raw materials in parts by weight: 17 parts of cement; 50 parts of river sand; 20 parts of steel slag sand; 20 parts of straw ash; 10 parts of fiber;

[0057] The preparation method of the steel slag sand-straw ash mixed mortar is as follows: take cement, river sand, steel slag sand, straw ash, fiber, and mortar admixture in parts by weight, and mix them evenly.

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
particle diameteraaaaaaaaaa
densityaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

Steel slag sand-straw ash co-doped mortar of the invention comprises the following raw materials (by weight): 5-30 parts of cement, 20-50 parts of river sand, 20-60 parts of steel slag sand, 1-20 parts of straw ash, 1-20 parts of fiber, and 0-5 parts of a mortar additive. By high value-added utilization of two industrial waste materials (steel slag and straw ash), the straw ash is used as an alkali-activator to activate early activity of steel slag and heat insulation function of straw fiber, high strength, low shrinkage, slight expansion, safety and stability, heat insulation and environmental protection of the steel slag sand-straw ash co-doped mortar have achieved good effects.

Description

technical field [0001] The invention belongs to the field of thermal insulation mortar, in particular to steel slag sand-straw ash composite mortar and a preparation method thereof. Background technique [0002] Mortar is a bonding substance used in building bricks, usually composed of a certain proportion of sand and cementing materials plus water. With the rapid development of cities, river sand, one of the commonly used materials in mortar, is increasingly in short supply. Due to the needs of environmental protection, mining of river sand has been banned in many areas, which makes it urgent to find alternatives to river sand. In the current process of preparing construction mortar, some industrial waste residues such as fly ash and slag have been widely used, which not only reduces the production cost of mortar to a certain extent, but also improves the working performance and durability of mortar. . Even so, the performance of mortar obtained by using fly ash, slag and...

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): C04B28/00C04B18/14C04B18/24
CPCC04B18/142C04B18/24C04B28/00C04B2201/32C04B2201/50C04B14/068C04B18/101C04B24/2623C04B24/383Y02W30/91
Inventor 江飞飞马剑王静芳孙杰
Owner 江苏鼎诺建筑科技有限公司
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