Unlock instant, AI-driven research and patent intelligence for your innovation.

Composite building material with sea sand as aggregate and preparation method thereof

A technology of composite building materials and sea sand, which is applied in the field of composite building materials and can solve problems such as low strength and fast coagulation

Active Publication Date: 2021-11-05
中科镁基(北京)科技有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its strength is lower, and at the same time it sets faster

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A composite building material with sea sand as aggregate, in parts by weight, the raw materials include: 75 parts of sea sand, 20 parts of fly ash, 70 parts of light-burned magnesia, 65 parts of magnesium sulfate solution, and 1 part of defoamer , 3 parts of water reducing agent, 3 parts of composite modifier, 20 parts of water. The composite modifier is composed of 55wt% phosphogypsum, 30wt% water glass, 3wt% sodium gluconate and 12wt% silane coupling agent. Wherein, the content of activated magnesium oxide in light-burned magnesium oxide is 50wt%; Magnesium sulfate solution has a density of 1.2g / cm 3 aqueous solution of magnesium sulfate. The defoamer is emulsified glycerin; the water reducer is polycarboxylate high-efficiency water reducer. The silane coupling agent is KH550.

[0021] The preparation method of this composite building material comprises the following steps:

[0022] (1) Weigh each raw material according to the above weight ratio, and set aside;

...

Embodiment 2

[0029] A composite building material with sea sand as aggregate, in parts by weight, the raw materials include: 80 parts of sea sand, 25 parts of fly ash, 90 parts of light-burned magnesia, 85 parts of magnesium sulfate solution, and 1.5 parts of defoamer , 3.5 parts of water reducing agent, 6 parts of composite modifier, 25 parts of water. The composite modifier is composed of 60wt% phosphogypsum, 25wt% water glass, 4wt% sodium gluconate and 11wt% silane coupling agent. Wherein, the content of activated magnesia in the light-burned magnesia is 55wt%; The density of magnesium sulfate solution is 1.22g / cm 3 aqueous solution of magnesium sulfate. The defoamer is emulsified glycerin; the water reducer is polycarboxylate high-efficiency water reducer. The silane coupling agent is KH550.

[0030] The preparation method of this composite building material comprises the following steps:

[0031] (1) Weigh each raw material according to the above weight ratio, and set aside;

[0...

Embodiment 3

[0038] A composite building material with sea sand as aggregate, in parts by weight, the raw materials include: 90 parts of sea sand, 30 parts of fly ash, 100 parts of light-burned magnesium oxide, 95 parts of magnesium sulfate solution, and 2 parts of defoamer , 5 parts of water reducer, 8 parts of composite modifier, 30 parts of water. The composite modifier is composed of 70wt% phosphogypsum, 20wt% water glass, 5wt% sodium gluconate and 5wt% silane coupling agent. Wherein, the content of activated magnesium oxide in light-burned magnesium oxide is 65wt%; Magnesium sulfate solution has a density of 1.24g / cm 3 aqueous solution of magnesium sulfate. The defoamer is emulsified glycerin; the water reducer is polycarboxylate high-efficiency water reducer. The silane coupling agent is KH570.

[0039] The preparation method of this composite building material comprises the following steps:

[0040] (1) Weigh each raw material according to the above weight ratio, and set aside; ...

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
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

A composite building material with sea sand as aggregate and a preparation method thereof. In parts by weight, the raw materials include: 70-90 parts of sea sand, 20-30 parts of fly ash, 70-100 parts of light-burned magnesia, 60 ‑100 parts of magnesium sulfate solution, 1‑2 parts of defoamer, 3‑5 parts of water reducing agent, 3‑8 parts of composite modifier, 20‑35 parts of water. Wherein the composite modifier is composed of 50-70wt% phosphogypsum, 20-30wt% water glass, 3-5wt% sodium gluconate and 5-15wt% silane coupling agent. The raw materials are mixed step by step and fully stirred to obtain a composite building material slurry; then poured into a mold, shaped, demolded after curing for 24 hours, and then naturally cured to obtain a composite building material. Using sea sand as aggregate and magnesium oxysulfate cement as the main cementitious material; at the same time, rationally selecting the type of composite modifier and adjusting its dosage reasonably, and finally obtaining a composite building material with high strength, adjustable setting time, and good water resistance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to composite building materials with sea sand as aggregate. Background technique [0002] Sea sand refers to sand that has been eroded by seawater without desalination treatment, mostly from the junction of seawater and rivers. [0003] More than 90% of the total production of sea sand in the world is used as sand making machine construction and civil engineering materials, of which 45% are used as concrete fine aggregates. In addition, about 20% of sea sand is used to pave roadbeds, about 20% is used as filler for land reclamation, and the remaining 15% is used for asphalt concrete. [0004] CN108409283A is the applicant's early research, which uses sea sand as aggregate and magnesium oxychloride cement as the main cementitious material to obtain composite building materials. Magnesium oxychloride cement is an air-hardening cementitious material made by mixing light-burned magne...

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 Patents(China)
IPC IPC(8): C04B28/30C04B111/27
CPCC04B28/30C04B2201/52C04B2111/27C04B14/068C04B18/08C04B2103/50C04B2103/302C04B12/04C04B22/10C04B24/42C04B22/144
Inventor 张志远朱信雄
Owner 中科镁基(北京)科技有限公司