Desert aeolian sand modified concrete technology

A desert aeolian sand and modification technology, applied in the field of building materials, can solve the problems of tensile stress exceeding tensile strength, affecting concrete durability, volume change, etc., achieving good durability, improving freeze-thaw resistance, and volume shrinkage. low rate effect

Inactive Publication Date: 2020-11-03
黄勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing aeolian sand concrete has low strength, and it is easy to cause volume change and shrinkage due to the evaporation of internal water, so that the concrete tensile stress in some parts of the internal structure of the concrete exceeds its tensile strength, and finally produces tiny cracks, affecting durability of concrete

Method used

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  • Desert aeolian sand modified concrete technology
  • Desert aeolian sand modified concrete technology
  • Desert aeolian sand modified concrete technology

Examples

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preparation example Construction

[0021] Wherein, the raw material components of the activator include by weight: 3-5 parts by weight of sodium silicate, 1-2 parts by weight of dipotassium hydrogen phosphate, and 15-20 parts by weight of hydrochloric acid solution with a mass fraction of 10%-15%. , 10-15 parts by weight of silica powder, 9-11 parts by weight of metakaolin, 5-9 parts by weight of graphene oxide, 3-5 parts by weight of borax, 1-2 parts by weight of aluminum oxide and 3-4 parts by weight of calcium chloride part; the preparation method comprises the steps of: weighing silicon micropowder, metakaolin, graphene oxide, borax and aluminum oxide in proportion and mixing them evenly, then pulverizing so that more than 90% of the particles have a particle size of no more than 1 μm; Calcining at a temperature of ℃ for 2-3 hours, then adding other remaining raw material components, mixing evenly, raising the temperature to 200-210℃ at a rate of 1-2℃ / min, continuing calcination for 5-6 hours, and cooling do...

Embodiment 1

[0028] This embodiment provides a desert aeolian sand modified concrete technology, including the following steps.

[0029] Step 1: Mix the first raw material components thoroughly to obtain a mixed material; the first raw material component includes an activator, cement and fiber in a mass ratio of 1:10:2.

[0030] Wherein, the raw material components of the activator include by weight: 3 parts by weight of sodium silicate, 2 parts by weight of dipotassium hydrogen phosphate, 20 parts by weight of hydrochloric acid solution with a mass fraction of 10%, 10 parts by weight of silica micropowder, metakaolin 11 parts by weight, 5 parts by weight of graphene oxide, 5 parts by weight of borax, 1 part by weight of aluminum oxide and 4 parts by weight of calcium chloride; the preparation method comprises the steps of: mixing silica powder, metakaolin, graphene oxide, borax and three Weigh the aluminum oxide in proportion and mix it evenly, then crush it so that more than 90% of the p...

Embodiment 2

[0035] This embodiment provides a desert aeolian sand modified concrete technology, including the following steps.

[0036] Step 1: Mix the first raw material components thoroughly to obtain a mixed material; the first raw material component includes an activator, cement and fiber in a mass ratio of 1:12:3.

[0037] Wherein, the raw material components of the activator include by weight parts: 5 parts by weight of sodium silicate, 1 part by weight of dipotassium hydrogen phosphate, 15 parts by weight of hydrochloric acid solution with a mass fraction of 15%, 15 parts by weight of silicon micropowder, metakaolin 9 parts by weight, 9 parts by weight of graphene oxide, 3 parts by weight of borax, 2 parts by weight of aluminum oxide and 3 parts by weight of calcium chloride; the preparation method comprises the steps of: mixing silica powder, metakaolin, graphene oxide, borax and three Aluminum oxide is weighed in proportion and mixed evenly, then pulverized so that more than 90% ...

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Abstract

The invention relates to a desert aeolian sand modified concrete technology which comprises the following steps: uniformly mixing and stirring a first raw material component to obtain a mixed material; adding the second raw material component into the mixed material, then stirring for a preset time, then loading into a mold, and carrying out molding maintenance to obtain desert aeolian sand modified concrete; wherein the first raw material component comprises an excitant, cement and fibers, the second raw material component comprises desert aeolian sand and water, the mass ratio of the excitant to the cement to the fibers is 1 : (10-12) : (2-3), the mass ratio of the desert aeolian sand to the water is (1.2-2) : 1, and the mass ratio of the first raw material component to the second raw material component is 1 : (1.6-1.8). According to the invention, the desert aeolian sand, the excitant, the cement and the fibers are adopted as raw materials, the 7-day compressive strength of the prepared desert aeolian sand modified concrete can reach 30 MPa or above, the breaking strength can reach 10 MPa or above, the volume shrinkage rate is low, and durability is good.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a desert aeolian sand modified concrete (concrete) technology. Background technique [0002] Aeolian sand refers to the sand layer that is blown and deposited by the wind, and is more common in deserts and Gobi. The particle size of desert aeolian sand is mainly distributed between 0.074-0.250mm, with a content of more than 90%. Particles larger than 0.25mm are very few, only 0.1%; particles smaller than 0.074mm are less than 9%; uneven The coefficient is about 1.35. Desert aeolian sand is too fine and sticky, and has poor plasticity compared with river sand, so it is not suitable for direct use in construction and concrete. However, there are a large number of desert aeolian sand resources in Northwest my country. If the local rich desert aeolian sand resources can be used to prepare concrete suitable for engineering applications, the cost of construction projects c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34
CPCC04B28/344C04B2201/50C04B12/04C04B22/122C04B18/146C04B14/106C04B14/024C04B22/0013C04B22/06C04B22/124C04B7/00C04B14/38C04B14/48C04B14/46C04B16/0633C04B14/068C04B18/248
Inventor 黄勇黄岩袁捷
Owner 黄勇
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