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Method for preparing cement mortar

A technology of cement mortar and cement, which is applied in the field of building materials, can solve problems such as unsatisfactory modification effects, and achieve the effects of improved resistance to chloride ion erosion, improved tensile strength, and improved bond strength

Inactive Publication Date: 2012-11-21
CHINA TIESIJU CIVIL ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many types of research on polymer modified cement mortar, but the modification effect is still unsatisfactory.

Method used

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  • Method for preparing cement mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 600 grams of cement, 1200 grams of fine sand, and 0.324 grams of cellulose, put them in a blender and manually stir them evenly, then add 250 grams of water, and after the manual mixer stirs at a slow speed, add 5.4 grams of polycarboxylate superplasticizer solution ( There are 0.216 grams of sodium gluconate) manual mixer at a slow speed and stir evenly, add 200 grams of water-soluble polyurethane solution and manually stir evenly, then add 100 grams of water, then turn the mixer to automatic, stir slowly for one minute, and stir quickly for one minute Minutes, stop for one minute, and stir for another minute, inject the new mortar that has been stirred into a mold, and put it in a cement mortar standard curing box for curing. The flexural compressive strength and elastic modulus of the 28-day cement mortar were measured to be 6.0MPa, 50MPa, and 10500MPa respectively

Embodiment 2

[0026] Take 600 grams of cement, 1200 grams of fine sand, and 0.324 grams of cellulose, put them in a blender and manually stir them evenly, then add 250 grams of water, and after the manual mixer stirs at a slow speed, add 5.4 grams of polycarboxylate superplasticizer solution ( There are 0.216 grams of sodium gluconate) manual mixer and stir at a slow speed, add 150 grams of water-soluble polyurethane solution and manually stir evenly, then add 100 grams of water, then turn the mixer to automatic when stirring slowly for one minute and stir quickly for one minute Stop for one minute and then stir for another minute, inject the new mortar that has been stirred into a mold, and put it in a cement mortar standard curing box for curing. The flexural compressive strength and elastic modulus of the cement mortar measured for 28 days were 5.5MPa, 54MPa, and 1257MPa, respectively.

Embodiment 3

[0028] Take 600 grams of cement, 1200 grams of fine sand, and 0.324 grams of cellulose, put them in a blender and manually stir them evenly, then add 250 grams of water, and after the manual mixer stirs at a slow speed, add 5.4 grams of polycarboxylate superplasticizer solution ( There are 0.216 grams of sodium gluconate) manual mixer and stir at a slow speed, add 250 grams of water-soluble polyurethane solution and manually stir evenly, then add 100 grams of water, and then adjust the mixer to automatic when stirring slowly for one minute and stirring quickly for one minute Stop for one minute and then stir for another minute, inject the new mortar that has been stirred into a mold, and put it in a cement mortar standard curing box for curing. The flexural compressive strength and elastic modulus of the cement mortar measured for 28 days were 5.2MPa, 43MPa, and 9675MPa, respectively.

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Abstract

The invention discloses a method for preparing cement mortar. The method comprises the following steps of: after drying a selected raw material, namely trimethylolpropane (TMP) for a certain time, reacting the TMP with toluene diisocyanate under a certain condition to prepare a prepolymer; after filtering methoxyl polyethylene glycol under a certain condition, reacting the methoxyl polyethylene glycol with the prepolymer under a certain condition to prepare high-performance water soluble polyurethane; after cooling, diluting the water soluble polyurethane by adding water according to certain solid content; and stirring the prepared water soluble polyurethane and cement, fine sand, an additive and the like according to a certain weight ratio by a specific stirring process to obtain the high-performance cement mortar. The cement mortar prepared by the method has the advantages of high breaking strength, high elastic modulus and high corrosion resistance.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a method for preparing cement mortar. Background technique [0002] Cement mortar has many advantages such as abundant raw materials, low price, high compressive strength, good durability, simple production process, and wide range of uses, and is widely used in road and bridge engineering. However, ordinary cement mortar has disadvantages such as low bending and tensile strength, poor corrosion resistance, and weak impermeability. The alternating action of cold, heat, dry and wet will greatly reduce its service life. [0003] Since the advent of polymer modified cement-based materials in 1923, it has developed rapidly. After the 1980s, worldwide interest in research in this field has increased day by day, and a large number of research results have been achieved. Polymer modified cement mortar is cement mortar with polymer as modifier. The introduction of polymer makes the fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B24/282C04B28/02C04B14/06
Inventor 宿万章国辉刘瑾胡国金王宇峰朱成桂胡先海
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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