Lightweight concrete and preparation method thereof

A lightweight concrete, mixing and mixing technology, applied in the field of concrete, can solve the problems of poor mechanical properties and short service life of lightweight concrete, and achieve the effects of reducing shrinkage and cracking, improving mechanical properties, and fast speed

Pending Publication Date: 2021-02-26
廊坊市泽龙混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the porosity and low density of lightweight concrete not only endow lightweight concrete with many good properties, but also make the internal overall structure of lightweight concrete relatively loose, resulting in poor mechanical properties and long service life of lightweight concrete. short

Method used

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  • Lightweight concrete and preparation method thereof
  • Lightweight concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A preparation method of lightweight concrete, comprising the following steps:

[0057] S1. under the rotating speed of 300r / min, the water of 5.5kg sodium dodecylbenzene sulfonate and 43.75kg is mixed and stirred for 10min to obtain foaming solution;

[0058] S2. Under the rotating speed of 130r / min, mix 210kg of cement, 900kg of stones, 350kg of river sand, 1.5kg of polycarboxylate water reducing agent, 2.2kg of basalt fiber (10mm in length), 2.5kg of glass fiber, 0.6kg of straw fiber, 0.3kg sodium alginate, 6.5kg calcium carbonate whisker (particle size is 30nm), 1.2kg D-mannitol, 0.65kg calcium stearate and 81.25kg water mix and stir 5min, then add the foaming of step S1 The solution was continuously stirred for 20 min to obtain lightweight concrete.

Embodiment 2

[0060] A preparation method of lightweight concrete, comprising the following steps:

[0061] S1. under the rotating speed of 325r / min, the water of 5kg sodium dodecylbenzene sulfonate and 43.125kg is mixed and stirred for 12.5min to obtain foaming solution;

[0062] S2. Under the rotating speed of 140r / min, mix 240kg of cement, 875kg of stones, 370kg of river sand, 2.5kg of polycarboxylate water reducer, 2kg of basalt fiber (12.5mm in length), 3kg of glass fiber, 0.45kg of straw fiber, 0.6 kg sodium alginate, 6kg calcium carbonate whisker (particle size is 32.5nm), 1.3kg D-mannitol, 0.75kg calcium stearate and 71.875kg water were mixed and stirred for 7.5min, and then the foaming of step S1 was added. The solution was continuously stirred for 25 min to obtain lightweight concrete.

Embodiment 3

[0064] A preparation method of lightweight concrete, comprising the following steps:

[0065] S1. under the rotating speed of 350r / min, 4.5kg whipping agent (sodium dodecylbenzene sulfonate 2.5kg, α-olefin sulfonate sodium 2kg) is mixed and stirred 15min with the water of 42kg, obtains foaming solution;

[0066] S2. Under the rotating speed of 150r / min, mix 270kg of cement, 850kg of stones, 390kg of river sand, 3.5kg of polycarboxylate water reducer, 1.8kg of basalt fiber (15mm in length), 3.5kg of glass fiber, 0.3kg of straw fiber, 0.9kg sodium alginate, 5.5kg calcium carbonate whisker (particle size is 35nm), 1.4kg D-mannitol, 0.85kg foam stabilizer (calcium stearate is 0.5kg, hydroxypropyl methylcellulose is 0.35kg) and 63kg of water for 10 minutes, then add the foaming solution of step S1, and continue to stir for 30 minutes to obtain lightweight concrete.

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Abstract

The invention relates to the field of concrete, and particularly discloses lightweight concrete and a preparation method thereof. The lightweight concrete is prepared from the following raw materialsin parts by weight: cement, coarse aggregate, fine aggregate, water, a water reducing agent, basalt fibers, glass fibers, straw fibers, sodium alginate, calcium carbonate whiskers, D-mannitol, a foaming agent and a foam stabilizer. The preparation method comprises the following steps: S1, mixing and stirring the foaming agent and 35-40% of the total amount of water for 10-15 minutes to obtain a foaming solution; and S2, mixing and stirring all the rest raw materials and the rest water for 5-10 minutes, then adding the foaming solution obtained in the step S1, and continuing to stir for 20-30 minutes. The lightweight concrete has the advantages of good thermal insulation property, high mechanical property and long service life; in addition, the preparation method is simple in step, easy tooperate, low in cost of used raw materials and suitable for large-scale production.

Description

technical field [0001] The present application relates to the field of concrete, more particularly, it relates to a lightweight concrete and a preparation method thereof. Background technique [0002] Lightweight concrete, also known as foamed concrete, is a new type of lightweight thermal insulation material containing a large number of closed pores, which is formed by fully foaming the foaming agent by mechanical means, mixing the foam and cement slurry uniformly, and then pouring and curing. . Lightweight concrete is widely used in wall and roof thermal insulation projects, lightweight concrete components and products, building floor heating systems, large tunnels due to its good characteristics of light weight, heat preservation, heat insulation, moisture resistance and sound insulation. , high-grade highways and subway backfill projects. [0003] However, the porosity and low density of lightweight concrete not only endow lightweight concrete with many good properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B28/04C04B111/40
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B14/02C04B14/06C04B14/4643C04B14/42C04B18/24C04B24/20C04B24/16C04B24/383C04B24/38C04B24/02C04B2103/302C04B2103/48C04B2103/42C04B14/383C04B24/2641C04B22/143C04B38/10C04B38/0067
Inventor 韩新力张雅静王洪奎
Owner 廊坊市泽龙混凝土有限公司
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