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Method for preparing artificial high-strength lightweight aggregate ceramsite sand by utilizing perlite

A technology of ceramsite sand and lightweight aggregate, which is applied in the preparation of ceramsite sand and artificial lightweight aggregate high-strength ceramsite, which can solve the problems of difficult application of structural concrete, low cylinder compressive strength, increased energy consumption, etc., and achieve a large design direction Performance and flexibility, lower production costs, lower apparent density

Active Publication Date: 2020-12-25
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has the following deficiencies: (1) adopts two sintering treatments, prolongs the production process, increases energy consumption, and is a big burden on the environment
(2) The cylinder compressive strength of ceramsite is low, so it is difficult to apply to structural concrete
This invention also has the following problems: (1) the sintering temperature is relatively high, which not only requires higher production equipment, but also consumes a lot of energy
(2) This preparation method needs to add auxiliary agent additionally, has increased production cost

Method used

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  • Method for preparing artificial high-strength lightweight aggregate ceramsite sand by utilizing perlite
  • Method for preparing artificial high-strength lightweight aggregate ceramsite sand by utilizing perlite
  • Method for preparing artificial high-strength lightweight aggregate ceramsite sand by utilizing perlite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] 1. Known cement density ρ 水泥 =3150kg / m 3 , expanded perlite particle size 0.1-1.5mm, apparent density ρ 珍珠岩 =348kg / m 3 , fly ash apparent density ρ 粉煤灰 =2200kg / m 3 , Density ρ of absorbent resin 吸水树脂 ≈1000kg / m 3

[0085] In this embodiment, the amount of each material used per cubic meter is used as the basis for calculation, and the volume ratio and addition amount of each raw material are shown in Table 2 below.

[0086] In table 2 embodiment 1, each material admixture per cubic meter, unit kg, m 3

[0087]

[0088] The formula is calculated theoretically to obtain the finished ceramsite sand, and the apparent density of the ceramsite sand is 1782.23kg / m 3 .

[0089] 2. First take 0.01m 3 The expanded perlite is pre-wetted to reach saturation and the surface is dry for later use, according to 0.07m 3 Weigh cement by volume fraction, weigh 50kg of pre-wet water-absorbent resin (absorb water more than 20 times its own mass), calculate the amount of fly as...

Embodiment 2

[0099] 1. Known cement density ρ 水泥 =3150kg / m 3 , expanded perlite particle size 0.1-1.5mm, apparent density ρ 珍珠岩 =348kg / m 3 , fly ash apparent density ρ 粉煤灰 =2200kg / m 3 , Density ρ of absorbent resin 吸水树脂 ≈1000kg / m 3

[0100] Each material of the present invention cooperates and adopts the consumption per cubic meter as calculation basis, and wherein each raw material volume ratio and admixture are as follows Table 3.

[0101] The amount of each material added per cubic meter in the embodiment 2 of table 3, unit kg, m 3

[0102]

[0103] The formula is calculated theoretically to obtain the finished ceramsite sand, and the apparent density of the ceramsite sand is 1488.67kg / m 3 .

[0104] 2. First take 0.25m 3 The expanded perlite is pre-wetted to reach saturation and the surface is dry for later use, according to 0.08m 3 The volume fraction weighs cement, weighs 20kg of pre-wet water-absorbing resin (water-retaining state), and calculates the amount of fly as...

Embodiment 3

[0113] 1. Known cement density ρ 水泥 =3150kg / m 3 , perlite particle size 0.1-1.5mm, apparent density ρ 珍珠岩 =348kg / m 3 , fly ash apparent density ρ 粉煤灰 =2200kg / m 3 , Density ρ of absorbent resin 吸水树脂 ≈1000kg / m 3

[0114] Each material of the present invention cooperates and adopts the consumption per cubic meter as calculation basis, and wherein each raw material volume ratio and admixture are as follows table 4.

[0115] Each material admixture per cubic meter in table 4 embodiment 3, unit kg, m 3

[0116]

[0117] The formula is calculated theoretically to obtain the finished ceramsite sand, and the apparent density of the ceramsite sand is 1217.85kg / m 3 .

[0118] 2. First take 0.45m 3 The expanded perlite is pre-wetted to reach saturation and the surface is dry for later use, according to 0.09m 3 The volume fraction weighs cement, weighs 10kg of pre-wet water-absorbing resin (water-retaining state), and calculates the amount of fly ash according to the formula...

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Abstract

The invention discloses a method for preparing artificial high-strength lightweight aggregate ceramsite sand by utilizing perlite. The method comprises the following six steps: pre-wetting and stirring a mixture, nucleating sand grains, pelletizing and growing, performing standing and pre-curing the ceramsite sand, carrying out a hydrothermal reaction and screening a product. The method specifically comprises the following steps: pre-wetting and stirring pre-wetted expanded perlite powder, pre-wetted water-absorbent resin, fly ash, cement and other raw materials to prepare a mixture, sending the mixture into a rolling balling disc, carrying out centrifugal rolling to form small-diameter ball cores, rolling the ball cores in the balling disc to adhere powder, and then balling to grow up toprepare ceramsite sand, wherein the ceramsite sand with larger diameter is the ceramsite, wherein the ceramsite sand with smaller diameter is the ceramic sand, and performing static curing and hydrothermal reaction on the ceramsite sand so that the strength of the ceramic sand is further improved, and finally, obtaining the ceramsite and the ceramic sand with light weight and high strength throughproduct screening.

Description

technical field [0001] The invention relates to a preparation method of artificial lightweight aggregate high-strength ceramsite and ceramsite, which belongs to the technical field of concrete materials. Background technique [0002] Ceramsite sand, ceramsite with a larger diameter of 5-30mm, and ceramsite with a smaller diameter below 5mm, as a kind of artificial aggregate, plays an important role in improving the performance of concrete. Adding an appropriate amount of ceramsite sand to concrete can firstly reduce the amount of cement and reduce production costs, and secondly, it can improve the workability of cement mortar during mixing and improve the working performance of concrete. In addition, after adding ceramsite sand to the concrete, the bleeding phenomenon of the concrete is reduced, the hydration of the cement is promoted, and the water retention performance of the concrete is improved. The ceramsite sand can be adjusted according to the particle gradation requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B28/04C04B38/08C04B38/06
CPCC04B18/027C04B28/04C04B38/08C04B38/06C04B14/185C04B2103/0051C04B18/08C04B22/002
Inventor 崔崇任许乐崔晓昱王朋涛李天君
Owner NANJING UNIV OF SCI & TECH
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