Steam-curing free coal ash brick and making method thereof

A technology of fly ash bricks and production methods, which is applied in the field of construction engineering, can solve the problems of reducing product strength, water resistance, etc., and achieve high-efficiency utilization, significant environmental benefits, economic benefits and social benefits.

Inactive Publication Date: 2018-05-22
THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, the amount of fly ash added to ordinary fly ash autoclaved bricks is only about 50%. If the amount of fly ash added is too high, the added fly ash cannot participate in the reaction, and the unreacted fly ash acts as a filler. It will reduce the physical properties such as product strength and water resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The steam-free fly ash brick consists of the following raw materials in parts by weight:

[0041] Fly ash: 72 parts, cement: 8 parts, desulfurized gypsum: 3.5 parts, aggregate: 8 parts, alkaline admixture: 6 parts, activator: 4 parts, water retaining agent: 0.15 parts, polypropylene fiber: 0.25 parts parts, water: 12 parts.

[0042] The activator is a composition of sulfate, sulfoaluminate, chloride, carbonate, alkaline oxide, silicate, lignosulfonate, phosphate, wherein the proportion of each component is:

[0043]Aluminum sulfate: 5%, iron sulfate: 7%, sulfoaluminate: 11%, ammonium chloride: 6%, calcium chloride: 4%, sodium carbonate: 5%, calcium oxide: 9%, magnesium oxide: 9 %, sodium silicate: 12%, lignosulfonate: 6%, sodium phosphate: 6%, sodium metaphosphate: 2%, sodium borate decahydrate: 18%.

[0044] The non-steamed fly ash brick prepared according to the above ratio, after 28 days of natural curing, the measured compressive strength is 11MPa, 35 times of fro...

Embodiment 2

[0046] The steam-free fly ash brick consists of the following raw materials in parts by weight:

[0047] Fly ash: 74 parts, cement: 10 parts, gypsum: 4 parts, aggregate: 9 parts, alkaline admixture: 7 parts, activator: 4 parts, water retaining agent: 0.1 part, fiber: 0.2 part, water : 12 servings.

[0048] The activator is a combination of sulfate, sulfoaluminate, chloride, carbonate, alkaline oxide, silicate, lignosulfonate, phosphate, borate, wherein the proportion of each component is :

[0049] Aluminum sulfate: 2%, aluminum potassium sulfate: 5%, iron sulfate: 3%, sulfoaluminate: 12%, ammonium chloride: 5%, sodium chloride: 5%, sodium carbonate: 6%, calcium oxide: 9%, magnesium oxide 9%, sodium silicate: 12%, lignosulfonate: 7%, sodium phosphate: 4%, sodium metaphosphate: 3%, sodium borate decahydrate: 18%.

[0050] Among them, the fly ash used is the fine ash collected directly from the flue gas after coal combustion in coal-fired power plants. The artificial proporti...

Embodiment 3

[0053] The steam-free fly ash brick consists of the following raw materials in parts by weight:

[0054] Fly ash: 75 parts, cement: 6 parts, gypsum: 2 parts, aggregate: 12 parts, alkaline admixture: 8 parts, activator: 5 parts, water retaining agent: 0.5 parts, fiber: 0.5 parts, water : 10 servings.

[0055] The activator is a combination of sulfate, sulfoaluminate, chloride, carbonate, alkaline oxide, silicate, lignosulfonate, phosphate, borate, wherein the proportion of each component is :

[0056] Aluminum sulfate: 5%, iron sulfate: 3%, potassium sulfate 4%, magnesium sulfate 3%, sulfoaluminate: 10%, sodium chloride: 8%, calcium chloride: 4%, sodium carbonate 4%, carbonic acid Potassium: 6%, Calcium Oxide: 8%, Magnesium Oxide: 8%, Potassium Silicate 7%, Sodium Metasilicate 3%, Lignosulfonate: 5%, Sodium Phosphate: 6%, Sodium Metaphosphate: 4% , Sodium borate decahydrate: 12%.

[0057] The non-steamed fly ash brick prepared according to the above ratio has a compressive ...

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Abstract

The invention relates to a steam-curing free coal ash brick and a making method thereof. According to the steam-curing free coal ash brick and the making method thereof, coal ash, cement, gypsum, aggregate, an alkali mixing material, an excitant, a water retaining agent, a fiber and water are adopted as raw materials, and a coal ash brick which meets strength standard requirements is made throughpremixing, aging, cloth pressing and steam-curing free normal-temperature maintenance. By adopting the steam-curing free coal ash brick and the making method thereof, efficient utilization of coal ashis achieved, the mixing utilization rate is greater than 70%, reactions can be implemented at a normal temperature, steam-curing is avoided in a maintenance mode, energy-saving production is achieved, coal ash bricks which meet strength standard requirements can be made, and remarkable environment benefits, economic benefits and social benefits can be made.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a non-steam curing fly ash brick and a manufacturing method thereof. Background technique [0002] Fly ash is the main solid waste discharged from coal-fired power plants, and it is the largest industrial waste in my country. In 2016, the discharge of fly ash reached more than 400 million tons, which caused huge pressure on my country's national economic construction and ecological environment. [0003] Utilizing fly ash to prepare fly ash autoclaved bricks is an effective measure for the comprehensive reuse of fly ash resources, with remarkable environmental and economic benefits. Fly ash autoclaved bricks are easy to produce and low in cost, and are widely used. However, high temperature above 170°C and 0.8MPa high pressure steam curing are required during production, which consumes a lot of energy. The high temperature mainly relies on coal to provide heat so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/08
CPCC04B28/14C04B28/144C04B7/00C04B18/08C04B16/0633C04B2103/46C04B22/064C04B18/146C04B18/141C04B18/142C04B18/027C04B18/10C04B14/02C04B22/148C04B22/149C04B22/142C04B22/124C04B22/10C04B22/066C04B12/04C04B24/18C04B22/16C04B22/0013C04B22/147Y02W30/91
Inventor 温海滨王晓鹏衣明彤张月峰闫传霖代金山商敬稳傅冰蒯坤熊春华
Owner THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
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