Dry-mixed pre-mixed mortar prepared by alkali activated slag cement, and preparation method thereof

A technology of alkali slag cement and ready-mixed mortar, which is applied in the field of building materials, can solve the problems of increasing the production cost of ready-mixed mortar, increasing the environmental load, multi-energy resources, etc., and achieves the improvement of the modern construction level, the reduction of storage yards, and the simple preparation process. Effect

Inactive Publication Date: 2012-12-12
JIANGSU NIGAO SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented method involves producing mixed concrete that includes calcium aluminate (C) or lime hydrates like CACH). By mixing these materials together with an acidic solution called soda ash during grinding processes, it becomes possible to create durable structures made from this mixture without relying solely upon fossil fuel combustion sources. These compositions have several benefits including lower costs associated with raw materials used, less harmful emissions when compared to traditional methods, improved mechanical properties due to stronger bonds between particles, better moisture retainability, and enhanced resistance against fire hazards.

Problems solved by technology

This patented technical problem addressed by this patents relates to prevention of mixed mortars used during construction without causing harm or wasting resources compared to traditional methods like portland cements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A dry-mix masonry mortar prepared by alkali slag cement, milled steel mill waste granulated blast furnace slag to a specific surface area of ​​380 m 2 / kg, according to parts by weight, take 12 parts of steel mill waste slag granulated blast furnace slag, 0.8 part of activator, 8 parts of fly ash, 80 parts of aggregate, and 0.4 part of functional additive, wherein the activator consists of sodium silicate and Sodium carbonate is mixed according to the weight ratio of 2:1. Orthopedics is made of river sand and tailings mixed according to the weight ratio of 3:1. Its fineness modulus is 2.5. Functional additives include the following raw materials in weight percentage: water retention 80% water-reducing agent, 15% polycarboxylate superplasticizer, 5% tartaric acid coagulant regulator, among which the water-retaining agent is made by mixing methyl cellulose ether and stick clay at a weight ratio of 1:15. At normal temperature and pressure, put the above components into the...

Embodiment 2

[0025] A dry-mix plastering mortar prepared by alkali slag cement, milling steel mill waste granulated blast furnace slag to a specific surface area of ​​400 m 2 / kg, according to parts by weight, take 15 parts of steel mill waste slag granulated blast furnace slag, 0.9 part of activator, 5 parts of fly ash, 80 parts of aggregate, and 0.5 part of functional additive, wherein the activator consists of sodium silicate and Potassium carbonate is mixed at a weight ratio of 2:1. Orthopedics is made of river sand and machine-made sand at a weight ratio of 3:1. Its fineness modulus is 2.4. Functional additives include the following raw materials in weight percentage: water retention 75% water-reducing agent, 20% water-reducing agent, 5% sodium gluconate coagulation regulator, wherein the water-retaining agent is mixed with ethyl cellulose ether and bentonite at a weight ratio of 1:12, and the water-reducing agent is made of naphthalene-based water-reducer and The lignosulfonate is mi...

Embodiment 3

[0027] A dry-mixed floor mortar prepared by alkali slag cement, milling steel mill waste slag granulated blast furnace slag to a specific surface area of ​​350 m 2 / kg, take 25 parts by weight of granulated blast furnace slag, 1.5 parts of activator, 75 parts of river sand, and 0.3 part of functional additive according to parts by weight, wherein the activator is composed of sodium silicate and sodium sulfate according to the weight ratio of 3 : 1 mixed, the fineness modulus of the river sand is 2.8, and the functional additives include the following raw materials in weight percentage: 70% water-retaining agent, 20% lignosulfonate water reducer, 10% citric acid coagulation regulator %, wherein the water-retaining agent is mixed with propyl cellulose ether and bar clay according to the weight ratio of 1:12. At normal temperature and pressure, put the above components into the mixer and mix for 8 minutes to obtain dry-mixed floor mortar.

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Abstract

The invention discloses dry-mixed pre-mixed mortar prepared by alkali activated slag cement, and a preparation method thereof. The dry-mixed pre-mixed mortar includes dry-mixed masonry mortar, dry-mixed plastering mortar and dry-mixed screeding mortar; the dry-mixed pre-mixed mortar is prepared by the following raw materials by weight: 10-30 parts of slag, 0.5-2 parts of excitant, 0-8 parts of mineral admixture, 70-85 parts of aggregate and 0.1-1 part of functional additivs. The preparation method thereof comprises the following steps: step (1) of grinding slag powder until specific surface area is 350-400 m<2>/kg; step (2) of weighing various components by weight in part; step (3) of putting various components weighed in the step (2) into a blender mixer at constant temperature by constant pressure, and mixing for 5-10 min to obtain dry-mixed pre-mixed mortar. The preparation method provided by the invention can prepare dry-mixed pre-mixed mortar by using alkali activated slag cement instead of portland cement so as to save cost, reduce resource consumption and reduce environmental pollution.

Description

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Claims

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Application Information

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Owner JIANGSU NIGAO SCI & TECH
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