阅读说明：本技术 一种胶凝材料改性剂及其制备方法和应用 (Cementing material modifier and preparation method and application thereof ) 是由 杨全兵 于 2020-06-04 设计创作，主要内容包括：本发明涉及一种胶凝材料改性剂及其制备方法和应用,该改性剂的原材料包括以下质量份组分：粉煤灰1000份,三萜皂甙0.2-2.0份和黄原胶1-5份。按质量份,将粉煤灰、三萜皂甙和黄原胶在混料机中混合,即可得到胶凝材料改性剂。该胶凝材料应用于建筑材料中。与现有技术相比,本发明具有降低粘性、调整色差、提高流动度或工作性等优点。(The invention relates to a cementing material modifier, a preparation method and application thereof, wherein the raw materials of the modifier comprise the following components in parts by mass: 1000 parts of fly ash, 0.2-2.0 parts of triterpenoid saponin and 1-5 parts of xanthan gum. Mixing the fly ash, the triterpenoid saponin and the xanthan gum in a mixer according to the mass parts to obtain the cementing material modifier. The cementing material is applied to building materials. Compared with the prior art, the invention has the advantages of reducing viscosity, adjusting color difference, improving fluidity or workability and the like.)

1. The cementing material modifier is characterized in that the raw materials of the modifier comprise the following components in parts by mass: 1000 parts of fly ash, 0.2-2.0 parts of triterpenoid saponin and 1-5 parts of xanthan gum.

2. A method of preparing the cement modifier of claim 1, wherein the method comprises: mixing the fly ash, the triterpenoid saponin and the xanthan gum in a mixer according to the mass parts to obtain the cementing material modifier.

3. The method for preparing the cementing material modifier according to claim 2, wherein the mixing time is 10-20 min.

4. Use of a cement modifier according to claim 1 in a construction material.

5. Use of a cement modifier according to claim 4, characterized in that the method of application comprises the following steps:

(1) mixing the cementing material, water and aggregate, and fully stirring to form slurry;

(2) pouring the slurry into a mold, vibrating to be dense, and trowelling the surface;

(3) and demolding after curing, and curing in air for a period of time to obtain the building material.

6. The use of the cement modifier according to claim 5, wherein the mass ratio of cement, water and aggregate is 1 (0.1-0.2) to (0.8-1.2).

7. Use of a cement modifier according to claim 5, wherein the cement comprises the cement modifier and the brucite-phosphate based cement in a mass ratio of 1 (1.5-9).

8. Use of a cement modifier according to claim 7, characterized in that the brucite-phosphate based cement comprises the following components in parts by mass: 100 parts of ammonium dihydrogen phosphate, 100 parts of brucite and 400 parts of borax, and 10-50 parts of borax.

9. The use of the cement modifier according to claim 5, wherein the aggregate comprises sand or sandstone.

10. The use of the cement modifier according to claim 5, wherein the curing time is 1-3h, the curing time is 3h-28 days, the temperature is 20 ± 5 ℃, and the humidity is 70 ± 10 rh%.

Technical Field

The invention relates to the technical field of building materials, in particular to a cementing material modifier and a preparation method and application thereof.

Background

The brucite-phosphate-based cementing material is prepared from brucite, ammonium dihydrogen phosphate and borax, has excellent comprehensive properties, particularly has ultra-fast setting and hardening, high early strength and bonding strength, good matching property of thermal expansion coefficient and elastic modulus with portland cement concrete, small dry shrinkage and the like, and can be widely applied to the fields of fast rush repair of civil engineering diseases such as highways, airport runways, municipal roads, bridges, industrial terraces and the like, safe disposal of harmful solid wastes and the like.

However, brucite-phosphate based cements also suffer from drawbacks such as being too viscous compared to portland cement, affecting compaction, rendering efficiency and effectiveness; it belongs to an acidic base material, and no corresponding effective chemical water reducing agent is found; the color of the cement is too white, and when the cement is used for repairing portland cement concrete, the color difference between the cement and the portland cement concrete is too large, so that the attractiveness is influenced, and the like.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a cementing material modifier which reduces viscosity, adjusts color difference and improves fluidity or workability, and a preparation method and application thereof.

The purpose of the invention can be realized by the following technical scheme:

the raw materials of the modifier comprise the following components in parts by mass: 1000 parts of fly ash, 0.2-2.0 parts of triterpenoid saponin and 1-5 parts of xanthan gum. The fly ash is an industrial byproduct formed by a thermal power station and belongs to I-grade low-calcium fly ash; the triterpenoid saponin is powder extracted from natural plant such as fructus Gleditsiae Abnormalis and tea cake; the xanthan gum is a powder chemical product, and the purity of the xanthan gum is more than or equal to 95 percent. The triterpenoid saponin has the main functions of reducing the viscosity of the freshly mixed material and increasing the fluidity, and is particularly effective for an acid material, namely brucite-phosphate-based cementing material.

A preparation method of the cementing material modifier comprises the following steps: mixing the fly ash, the triterpenoid saponin and the xanthan gum in a mixer according to the mass parts to obtain the cementing material modifier.

Further, the mixing time is 10-20 min.

The application of the cementing material modifier is to building materials.

Further, the method of application comprises the steps of:

(1) mixing the cementing material, water and aggregate, and fully stirring to form slurry;

(2) pouring the slurry into a mold, vibrating to be dense, and trowelling the surface;

(3) and demolding after curing, and curing in air for a period of time to obtain the building material.

Furthermore, the mass ratio of the cementing material to the water to the aggregate is 1 (0.1-0.2) to 0.8-1.2.

Further, the cementing material comprises a cementing material modifier and a brucite-phosphate-based cementing material in a mass ratio of 1 (1.5-9). That is, the cement modifier is incorporated into neat paste, mortar and concrete in an amount of 10-40% by weight in place of the brucite-phosphate based cement.

Further, the brucite-phosphate-based cementing material comprises the following components in parts by mass: 100 parts of ammonium dihydrogen phosphate, 100 parts of brucite and 400 parts of borax, and 10-50 parts of borax.

Further, the aggregate comprises sand or sandstone.

Further, the curing time is 1-3h, the curing time is 3h-28 days, preferably 3-7 days, the temperature is 20 +/-5 ℃, and the humidity is 70 +/-10 rh%.

Compared with the prior art, the invention has the following advantages:

(1) by doping the modifier, the viscosity of the brucite-phosphate base material can be obviously reduced, so that the construction performance and the plastering efficiency are improved, and the influence on the mechanical property is small;

(2) by doping the modifier, the color difference between the brucite-phosphate base material and the portland cement concrete can be effectively adjusted and reduced;

(3) when the water-gel ratio, namely the mass ratio of water to the gel material is kept unchanged, the fluidity or the workability of a material system can be improved by adding the modifier; or when the water-gel ratio is reduced, the modifier can be added to maintain the fluidity of the material system and play a role in reducing water;

(4) the invention has simple process technology, low production cost, easy popularization and application, obvious economic and social benefits and wide market application prospect.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.