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A kind of phosphate cement mortar proportioning method

A phosphate cement and mortar technology, applied in the fields of instruments, computational theoretical chemistry, informatics, etc., can solve the problems of unsuitable phosphate cement, retention, shortage, etc., achieve good operability and practicability, and avoid manpower and material resources Waste, simple and reasonable effect

Active Publication Date: 2022-03-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on phosphate cement at home and abroad is mainly focused on the preparation, performance and hydration mechanism of phosphate cement, and it is still in the laboratory research stage. For the application of potassium magnesium sulfate cement rapid hardening repair materials in actual engineering The research on mortar mix design and construction key technology is still relatively scarce
However, the traditional mortar mix ratio design method is not suitable for phosphate cement, and there is no ratio method for phosphate cement mortar at home and abroad.
In engineering applications, if it is necessary to study the influence of various factors on the performance of phosphate cement mortar through a large number of experiments, so as to obtain the optimal ratio of phosphate cement mortar will waste a lot of manpower and material resources

Method used

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  • A kind of phosphate cement mortar proportioning method
  • A kind of phosphate cement mortar proportioning method
  • A kind of phosphate cement mortar proportioning method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1. Design requirements

[0068] Requires the formulation of target intensity mean f MKPCM,m 35MPa potassium magnesium phosphate cement mortar, construction consistency C 0 30mm to 50mm.

[0069] 2. Raw materials

[0070] The mix ratio and performance of the potassium magnesium phosphate cement used are shown in the following table. The magnesium oxide is made of dead-burned magnesium oxide sintered at a high temperature of about 1500 °C, and the density is 3.13g / cm 3 . The retarder is anhydrous sodium acetate. Magnesium phosphate cement mortar strength test is a group of plastic mortar mixed with a magnesium phosphate cement (phosphate + magnesium oxide + retarder) by mass, a Chinese ISO standard sand, and a water-binder ratio of 0.21. Make a 40mm×40mm×160mm prism test body, cured for 2 hours in an environment with a temperature of 20°C±2°C and 60%±5%RH, and then remove the mold, and then continue to cure until the strength test. The compressive strength test refe...

Embodiment 2

[0102] 1. Design requirements

[0103] Requires the formulation of target intensity mean f MKPCM,m Potassium magnesium phosphate cement mortar of 55MPa, construction consistency C 0 40mm ~ 60mm.

[0104] 2. Raw materials

[0105] The mixture ratio and performance of the potassium magnesium phosphate cement used are shown in the following table. The magnesium oxide is made of dead-burned magnesium oxide sintered at a high temperature of about 1500 °C, and the density is 3.29g / cm 3 . The retarder is anhydrous sodium acetate. Magnesium phosphate cement mortar strength test is a group of plastic mortar mixed with a magnesium phosphate cement (phosphate + magnesium oxide + retarder) by mass, a Chinese ISO standard sand, and a water-binder ratio of 0.21. Make a 40mm×40mm×160mm prism test body, cured for 2 hours in an environment with a temperature of 20°C±2°C and 60%±5%RH, and then remove the mold, and then continue to cure until the strength test. The compressive strength tes...

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Abstract

The invention discloses a method for proportioning phosphate cement mortar, comprising the following steps: (1) determining the target performance of phosphate cement mortar, including the target strength average value f of phosphate cement mortar MKPCM,m and consistency C 0 ; (2) According to the pre-set target strength average f of phosphate cement mortar MKPCM,m , to determine the preparation strength f of phosphate cement mortar MKPCM,0 ; (3) According to the consistency C of the preset phosphate cement mortar 0 Determine the unit water consumption M of phosphate cement mortar w0 (4) determine the water-binder ratio w / b, and calculate the consumption of phosphate cement according to the water-binder ratio w / b; (5) determine the consumption M of sand s0 . This method can accurately and quickly obtain the mix ratio of phosphate cement mortar based on the target performance, and its operation is simple and reasonable, avoiding the waste of manpower and material resources caused by repeated trial and adjustment, and has good operability and practicability .

Description

technical field [0001] The invention relates to a method for proportioning cement mortar, more specifically, to a method for proportioning phosphate cement mortar. Background technique [0002] Phosphate cement (MPC) is prepared from metals or metal oxides and phosphates in a certain proportion. Phosphate cement has the characteristics of short setting time, high early strength, strong bonding ability, and small volume deformation. It has broad prospects in the repair and rush construction of airport runways, tunnels, mines and other civil buildings and national defense projects. The performance of phosphate cement mortar is affected by many factors, such as raw material performance, M / P, retarder type and dosage, water-binder ratio, sand-binder ratio, etc. At present, the research on phosphate cement at home and abroad is mainly focused on the preparation, performance and hydration mechanism of phosphate cement, and it is still in the laboratory research stage. For the app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34G16C10/00G16C60/00
CPCC04B28/34G06F30/20C04B14/304C04B14/068C04B2103/22
Inventor 钱春香戴俊杨凌俊
Owner SOUTHEAST UNIV
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