Dry-mixed mortar for pavement and preparation process thereof

A technology of dry powder mortar and mineral powder, which is applied in the field of building materials, can solve the problems of dry powder mortar construction performance and mechanical performance adverse effects, reduced service life of the road surface, and impact on the wear resistance of the road surface, so as to achieve excellent mechanical properties, increase water retention performance, Improve the effect of bonding

Inactive Publication Date: 2020-01-03
宁波新广亿建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The prior art scheme among the above has the following defects: the old sand for water glass casting contains dehydration high modulus sodium silicate water glass, sodium carbonate and sodium bicarbonate, which will adversely affect the workability and mechanical properties of the dry powder mortar. The dry powder mortar is mixed with water and then applied on the road surface, which will affect the wear resistance of the road surface, resulting in a reduction in the service life of the road surface and increasing the cost of road maintenance

Method used

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  • Dry-mixed mortar for pavement and preparation process thereof
  • Dry-mixed mortar for pavement and preparation process thereof
  • Dry-mixed mortar for pavement and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Table 1 A kind of dry powder mortar used for pavement and its weight percentage

[0036]

[0037]

[0038] Wherein the preparation method of the modified bentonite is: 1) 20kg of glucose is added into 300L water, and stirred until the glucose is completely dissolved; 2) Then continue to add 100kg of bentonite, stirring constantly, so that the bentonite is evenly dispersed; 3) Adjust the pH to 12-13, and then Raise the temperature to 80°C, stir for 6 hours, centrifuge after stirring, wash the precipitate with water for 5 times and then dry, the drying temperature is lower than 140°C, after drying, grind into powder to obtain modified bentonite.

[0039] The preparation technology of this dry powder mortar specifically comprises the following steps:

[0040] Step 1, first drying the yellow sand with a dryer, the moisture content after drying is less than 0.5%, screening the dried yellow sand, and then placing the screened yellow sand in a storage tank for subsequent...

Embodiment 2

[0043] Table 2 A kind of dry powder mortar used for pavement and its weight percentage

[0044] components weight percentage (%) components weight percentage (%) cement 12 Calcium stearate 1 mineral powder 6 Redispersible latex powder 2 fly ash 17 expanded perlite 2 yellow sand 33 calcium lignosulfonate 0.6 Modified bentonite 11 Aquasorb 0.8 stone powder 10 Dry powder defoamer 0.9 thickened powder 3 air entraining agent 0.7

[0045] Wherein the preparation method of modified bentonite is as follows: 1) 25kg of glucose is added into 400L of water, and stirred until the glucose is completely dissolved; 2) then continue to add 110kg of bentonite, stirring constantly, so that the bentonite is evenly dispersed; 3) adjust the pH to 12-13, and then Raise the temperature to 100°C, stir for 5 hours, centrifuge after stirring, wash the precipitate with water for 4 times and then dry, the drying temperature i...

Embodiment 3

[0048] Table 3 A kind of dry powder mortar used for pavement and its weight percentage

[0049]

[0050]

[0051] Wherein the preparation method of the modified bentonite is: 1) 30kg of glucose is added into 350L of water, and stirred until the glucose is completely dissolved; 2) Then continue to add 120kg of bentonite, stirring constantly, so that the bentonite is evenly dispersed; 3) Adjust the pH to 12-13, and then Raise the temperature to 120°C, stir for 4 hours, centrifuge after stirring, wash the precipitate with water for 3 times and then dry, the drying temperature is lower than 140°C, after drying, grind into powder to obtain modified bentonite.

[0052] The preparation technology of this dry powder mortar is the same as embodiment 1.

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Abstract

The invention relates to dry-mixed mortar for a pavement and a preparation process of the dry-mixed mortar. The invention relates to the technical field of building materials. The dry-mixed mortar specifically comprises the following components in percentage by weight: 11-13% of cement, 6-8% of mineral powder, 17-20.5% of fly ash, 26-33% of yellow sand, 9-11% of modified bentonite, 10-13% of stonepowder, 2.5-4% of thickening powder, 1-2% of waterproof agent, 1-2.5% of redispersible latex powder, 1-2% of expanded perlite and 1.5-3% of an additive. The preparation method of the modified bentonite is as follows: 1) adding 20-30kg of glucose into 300-400L of water and stirring until the glucose is completely dissolved; 2) continuously adding 100-120 kg of bentonite and continuously stirring to uniformly disperse the bentonite; 3) adjusting the pH to 12-13, then raising the temperature to 80-120 deg c, stirring for 4-6 hours, centrifuging after stirring, washing the precipitate with waterfor 3-5 times, and drying. The mortar prepared by the method has the effects of good wear resistance, long service life of the pavement and reduction of maintenance cost of the pavement when laid on the pavement.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a dry powder mortar used for road surfaces and a preparation process thereof. Background technique [0002] Dry powder mortar is a mixture of cement, sand, mineral admixtures and functional additives in a certain proportion, uniformly mixed in a dry state in a professional production plant, and mixed in a granular or powder state, and then packaged in dry powder Or transported to the construction site in bulk, and the dry powder mortar material that can be used directly after adding water and mixing according to regulations. After premixed and prepackaged dry powder mortar replaces on-site mixed mortar, more and more mechanized construction is used. This modern construction system can greatly improve production efficiency and project quality. [0003] The Chinese patent with the authorized announcement number CN10183838129B discloses a dry powder mortar, which include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/20
CPCC04B28/02C04B2111/0075C04B2111/2038C04B2201/50C04B18/141C04B18/08C04B14/06C04B14/104C04B14/02C04B24/085C04B14/185C04B24/18C04B2103/0057C04B2103/44C04B2103/304C04B2103/0068C04B24/42C04B24/10
Inventor 张立周宇武王彬彬唐圳
Owner 宁波新广亿建材有限公司
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