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Calcareous sand reinforced cement-based material and preparation method thereof

A technology for strengthening cement and base materials, applied in the field of strengthening cement, can solve the problems of increasing construction cost, increasing construction cost, increasing transportation cost, etc., and achieve the effect of shortening construction period, reducing construction cost and saving resources

Pending Publication Date: 2020-11-27
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] A few days ago, the exploration and exploitation of oil resources in the South China Sea were in full swing, and the construction projects on the island were also carried out rapidly. However, due to the special engineering geology on the island and the inconvenient transportation, the supply of construction raw materials is extremely inconvenient
If we want to supply raw materials from the mainland to the South China Sea, it will inevitably increase transportation costs, leading to an increase in construction costs. At the same time, the time for transporting raw materials will greatly extend the construction period, which will increase construction costs again. These have become urgent problems for engineers to solve.

Method used

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  • Calcareous sand reinforced cement-based material and preparation method thereof
  • Calcareous sand reinforced cement-based material and preparation method thereof
  • Calcareous sand reinforced cement-based material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh the raw materials according to the raw material ratio in Table 1; among them, A-1, 2, 3, B-1, 2, 3 aggregates are quartz sand, C-1, 2, 3, D-1, 2, 3, E- 1, 2, 3, F-1, 2, and 3 aggregates are calcareous sand with particle sizes of 0.25-0.5mm, 0.5-1.0mm, 1.0-2.0mm, and 0.25-0.5mm respectively; the unit in Table 1 is kg;

[0034] Table 1

[0035] Numbering cement fly ash expansion agent aggregate water fiber Superplasticizer A-1，2，3 575.80 164.51 82.27 411.28 205.64 0.00 15.83 B-1，2，3 575.80 164.51 82.27 411.28 205.64 0.00 10 C-1，2，3 575.80 164.51 82.27 411.28 205.64 0.00 10 D-1，2，3 575.80 164.51 82.27 411.28 205.64 0.00 15 E-1，2，3 575.80 164.51 82.27 411.28 205.64 0.00 15 F-1，2，3 599.81 171.37 85.70 428.43 214.21 0.00 15

[0036] Prepare the test piece as follows:

[0037] 1. Mixing of concrete mixture

[0038] (1) Prepare materials according to the determined mixing ratio...

Embodiment 2

[0054] Weigh raw materials according to the raw material ratio in Table 3; wherein, 2-A-1, 2, 3 aggregates are quartz sand, 2-B-1, 2, 3, 2-C-1, 2, 3, 2-D- 1, 2, 3, 2-E-1, 2, 3, 2-F-1, 2, 3 aggregates have particle sizes of 0.075-0.25mm, 0.25-0.5mm, 0.5-1.0mm, 1.0-2.0 mm, 0.25-0.5mm calcareous sand; the unit in Table 3 is kg;

[0055] table 3

[0056]

[0057]

[0058] Preparation method and uniaxial compression test are the same as in Example 1; the results are shown in Table 4;

[0059] Table 4

[0060]

[0061] This example is a performance comparison between cement-based materials and calcareous sand materials with a volume ratio of 1.7% without adding fibers;

[0062] The data in Table 4 shows that if the fiber is added according to the fiber volume ratio of the original quartz sand, the fiber mixing ratio is too high, the strength is low, and the sample is seriously agglomerated during stirring, which makes the mixer unable to operate. The ratio cannot satisf...

Embodiment 3

[0065] Weigh the raw materials according to the ratio of raw materials in Table 5; among them, 3-A-1, 2, 3, 3-B-1, 2, 3, 3-C-1, 2, 3, 3-D-1, 2, 3 , 3-E-1, 2, 3, 3-F-1, 2, 3 aggregates have particle sizes of 0.075-0.25mm, 0.25-0.5mm, 0.5-1.0mm, 1.0-2.0mm, 0.25-0.5 mm, 0.25-0.5mm calcareous sand; the unit in Table 5 is kg;

[0066] table 5

[0067] Numbering cement g fly ash expansion agent aggregate water fiber Superplasticizer 3-A-1，2，3 575.80 164.51 82.27 411.28 205.64 10.72 38.43 3-B-1，2，3 575.80 164.51 82.27 411.28 205.64 10.72 52.76 3-C-1，2，3 575.80 164.51 82.27 411.28 205.64 10.72 37.95 3-D-1，2，3 575.80 164.51 82.27 411.28 205.64 10.72 38.4 3-E-1，2，3 575.80 164.51 82.27 411.28 205.64 5.36 14.25 3-F-1，2，3 575.80 164.51 82.27 411.28 205.64 7.15 13.98

[0068] Preparation method and uniaxial compression test are the same as in Example 1; the results are shown in Table 6;

[0069] ...

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Abstract

The invention relates to the technical field of reinforced cement, in particular to a calcareous sand reinforced cement-based material and a preparation method thereof, and the calcareous sand reinforced cement-based material comprises the following raw materials: Portland cement, fly ash, an expanding agent, calcareous sand, water and a water reducing agent. The calcareous sand is used for replacing quartz sand commonly used in the prior art, the calcareous sand has many inner holes, when the inner holes are filled with a cementing material, the performance of an interface transition layer can be effectively improved, and the strength of the calcareous sand cement-based material is enhanced. During marine environment construction, calcareous sand is used for replacing quartz sand, local materials are used, the cost for manufacturing the cement-based material can be greatly reduced, and wide application of the cement-based material is better promoted.

Description

technical field [0001] The invention relates to the technical field of reinforced cement, in particular to a calcareous sand reinforced cement-based material and a preparation method thereof. Background technique [0002] A few days ago, the exploration and exploitation of oil resources in the South China Sea were in full swing, and the construction projects on the island were also carried out rapidly. However, the special engineering geology on the island, coupled with inconvenient transportation, made the supply of construction raw materials very inconvenient. To supply raw materials from the mainland to the South China Sea will inevitably increase transportation costs, leading to an increase in construction costs. At the same time, the time for transporting raw materials will greatly extend the construction period, which will increase construction costs again. These have become urgent problems for engineers to solve. Contents of the invention [0003] In order to solve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B14/28C04B2103/302C04B2103/0068C04B16/0641
Inventor 张小燕王振波左建平
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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