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Geopolymeric concrete and preparation method thereof

A geopolymer and concrete technology, applied in the field of concrete, can solve the problem of high preparation cost and achieve the effect of reducing and saving the amount of use

Active Publication Date: 2018-11-06
成都宏基建材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to alleviate the current problem of high preparation cost of geopolymer concrete and the problem of efficient utilization of alkaline mixed waste liquid with high aluminum content produced during the processing of aluminum alloy raw materials, the present invention provides a geopolymer concrete and its preparation method

Method used

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  • Geopolymeric concrete and preparation method thereof

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Effect test

Embodiment 1

[0030] A geopolymer concrete, prepared by mixing and stirring the following raw materials: slag (S95 grade slag, specific surface area 410m 2 / kg, SiO 2 with Al 2 o 3 The mass ratio is 2.8): 300 parts, fly ash (Class I fly ash, SiO 2 with Al 2 o 3 The mass ratio is 2.4): 60 parts, silica fume (SiO 2 content 97.6%): 40 parts, composite activator: 230 parts, sodium lignosulfonate (water reducer): 2 parts, sodium pyrophosphate (retarder): 1 part, fine aggregate (quartz sand, medium sand , fineness modulus 2.5)): 680 parts, coarse aggregate (5-31mm continuously graded stone): 1230 parts, fiber (basalt fiber, length 25mm, aspect ratio 600): 4.8 parts, calculated in parts by weight .

[0031] Among them, the composite activator is prepared from the following raw materials under the heating condition of 65°C: instant sodium silicate (powder, modulus 2.9): 32 parts, sodium hydroxide (industrial grade, tablet) 4 parts, high aluminum-containing alkali Sexual waste liquid (sodium...

Embodiment 2

[0036]A geopolymer concrete, prepared by mixing and stirring the following raw materials: slag (S95 grade slag, specific surface area 410m 2 / kg, SiO 2 with Al 2 o 3 The mass ratio is 2.8): 290 parts, fly ash (Class I fly ash, SiO 2 with Al 2 o 3 The mass ratio is 2.4): 60 parts, silica fume (SiO 2 content 97.6%): 40 parts, composite activator: 230 parts, sodium lignosulfonate (water reducer): 2 parts, sodium pyrophosphate (retarder): 1 part, fine aggregate (quartz sand, medium sand , fineness modulus 2.5)): 680 parts, coarse aggregate (5-31mm continuously graded stone): 1230 parts, fiber (basalt fiber, length 25mm, aspect ratio 600): 4.8 parts, calculated in parts by weight .

[0037] Among them, the composite activator is prepared from the following raw materials under heating conditions (65°C): instant sodium silicate (powder, modulus 2.9): 32 parts, sodium hydroxide (industrial grade, tablet) 4 parts, high aluminum content Alkaline waste liquid (sodium hydroxide co...

Embodiment 3

[0042] A geopolymer concrete, prepared by mixing and stirring the following raw materials: slag (S95 grade slag, specific surface area 410m 2 / kg, SiO 2 with Al 2 o 3 The mass ratio is 2.8): 310 parts, fly ash (Class I fly ash, SiO 2 with Al 2 o 3 The mass ratio is 2.4): 55 parts, silica fume (SiO 2 content 97.6%): 38 parts, composite activator: 230 parts, sodium lignosulfonate (water reducing agent): 2 parts, sodium pyrophosphate (retarder): 1 part, fine aggregate (quartz sand, medium sand , fineness modulus 2.5)): 680 parts, coarse aggregate (5-31mm continuously graded stone): 1230 parts, fiber (basalt fiber, length 25mm, aspect ratio 600): 4.8 parts, calculated in parts by weight .

[0043] Among them, the composite activator is prepared from the following raw materials under heating conditions (65°C): instant sodium silicate (powder, modulus 2.9): 32 parts, sodium hydroxide (industrial grade, tablet) 4 parts, high aluminum content Alkaline waste liquid (sodium hydr...

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Abstract

The invention belongs to the field of concrete and particularly discloses geopolymeric concrete. The geopolymeric concrete is prepared from, by weight, 280-320 parts of mineral powder, 55-65 parts offly ash, 35-40 parts of silica fume, 220-240 parts of composite activator, 1.5-2 parts of water reducing agent, 0.8-1.2 parts of retarder, 665-692 parts of fine aggregates, 1200-1250 parts of coarse aggregates and 4.5-5.5 parts of fiber. According to the prepared geopolymeric concrete, alkaline waste liquor with high aluminum content, instantly soluble sodium silicate and sodium hydroxide are adopted to prepare the composite activator so that the dosage of the sodium hydroxide in the composite activator of the geopolymeric concrete can be greatly reduced, meanwhile, sodium metaaluminate in thewaste liquor can serve as active aluminium corrector or part of active aluminium raw material of a geopolymeric concrete system, and water in the waste liquor can serve as a water source of the concrete, so that the current preparation cost of the geopolymeric concrete is greatly reduced; in addition, the preparation method provides a new path for efficient resource utilization of the alkaline waste liquor with high aluminum content which is generated in the machining process of the aluminium alloy raw material.

Description

technical field [0001] The invention belongs to the field of concrete, and specifically discloses a geopolymer concrete and a preparation method thereof. Background technique [0002] Geopolymer is a gelling material formed by using low-calcium active silica-alumina raw materials through alkali excitation. Under the action of the activator, the Si-O and Al-O bonds in the active silica-alumina raw materials are broken to form [SiO 4 ] 4- , [AlO 4 ] 5- Tetrahedral, and then polycondensed to form an inorganic polymer with O-Si-O-Al-O network structure, has the advantages of fast coagulation and hardening, high early strength, high temperature resistance, acid and alkali corrosion resistance, etc. It is used in traffic repair materials, high-strength materials , Solidified nuclear waste, fireproof materials and other fields have great application prospects. At the same time, studies have shown that starting from the carbon footprint of ordinary concrete and geopolymer concr...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/006C04B2201/50C04B2201/52C04B24/18C04B22/16C04B14/02C04B14/06C04B14/4643Y02P40/10
Inventor 范长利肖超
Owner 成都宏基建材股份有限公司
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