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A kind of epoxy resin composition and its preparation method and application

A technology of epoxy resin and epoxy resin glue, applied in construction, infrastructure engineering, infrastructure repair and other directions, can solve the problems of low strength, difficult quality assurance, high cost, simple preparation process, short curing time, low cost effect

Active Publication Date: 2019-09-17
建华建材(肇庆)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using sulfur glue, after the repair is completed, it needs to solidify for about 12 hours before the pile sinking. Although the cost is lower, the time is more than 2 times longer than that of epoxy resin glue, and it is more difficult for the second pile sinking after delaying the time
Using epoxy resin glue, although the curing time is shorter than sulfur glue, its strength is lower, the quality is difficult to guarantee, and its cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An epoxy resin composition, in parts by weight, includes components: 100 parts of epoxy resin glue; 150 parts of cement; 50 parts of yellow sand; wherein, epoxy resin glue, in parts by weight, includes components: 100 parts of epoxy resin; 1 part of 2-methylimidazole; 1 part of 4,4'-diaminodiphenylmethane.

[0038] Its preparation method comprises the following steps:

[0039] a. With constant stirring, add 4,4'-diaminodiphenylmethane into the epoxy resin, stir for 30 minutes until 4,4'-diaminodiphenylmethane is completely dissolved, then add 2-methylimidazole Stir and mix for 10 minutes to obtain epoxy resin glue;

[0040] b. Mix the epoxy resin glue, cement and yellow sand according to the weight ratio, and fully stir to obtain the epoxy resin composition.

[0041] According to GB50010-2010 "Code for Design of Concrete Structures", the prepared epoxy resin composition has a strength of C80 after 4 hours of curing.

Embodiment 2

[0043] An epoxy resin composition, in parts by weight, includes components: 120 parts of epoxy resin glue; 150 parts of cement; 60 parts of yellow sand; wherein, epoxy resin glue, in parts by weight, includes components: 100 parts of epoxy resin; 1.5 parts of 2-ethylimidazole-4-methylimidazole; 1.5 parts of 4,4'-diaminodiphenylmethane.

[0044] Its preparation method comprises the following steps:

[0045] a. With constant stirring, add 4,4'-diaminodiphenylmethane into the epoxy resin, stir for 35 minutes until 4,4'-diaminodiphenylmethane is completely dissolved, then add 2-ethylimidazole -4-methylimidazole was stirred and mixed for 15 minutes to obtain epoxy resin glue;

[0046] b. Mix the epoxy resin glue, cement and yellow sand according to the weight ratio, and fully stir to obtain the epoxy resin composition.

[0047] According to GB50010-2010 "Code for Design of Concrete Structures", the prepared epoxy resin composition has a strength of C75 after 4 hours of curing.

Embodiment 3

[0049] An epoxy resin composition, in parts by weight, includes components: 150 parts of epoxy resin glue; 120 parts of cement; 40 parts of yellow sand; wherein, epoxy resin glue, in parts by weight, includes components: 100 parts of epoxy resin; 1 part of 2,4-dimethylimidazole; 1 part of 4,4'-diaminodiphenylmethane.

[0050] Its preparation method comprises the following steps:

[0051] a. Under constant stirring, add 4,4'-diaminodiphenylmethane into the epoxy resin, stir for 20 minutes until 4,4'-diaminodiphenylmethane is completely dissolved, then add 2,4-diaminodiphenylmethane Methylimidazole was stirred and mixed for 8 minutes to obtain epoxy resin glue;

[0052] b. Mix the epoxy resin glue, cement and yellow sand according to the weight ratio, and fully stir to obtain the epoxy resin composition.

[0053] According to GB50010-2010 "Code for Design of Concrete Structures", the prepared epoxy resin composition has a strength of C75 after 4 hours of curing.

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Abstract

The invention discloses an epoxy resin composition and a preparation method and application thereof. The epoxy resin composition comprises 80-150 parts of epoxy resin adhesive, 120-250 parts of cement and 40-80 parts of yellow sand. The epoxy resin composition has the advantages that the epoxy resin composition is prepared by adding the cement and the yellow sand of a specific proportion into the existing epoxy resin adhesive, the strength of the prepared epoxy resin composition can reach up to C80 after 4 hours of curing, the strength of the epoxy resin composition is evidently increased as compared with that of the epoxy resin adhesive, the strength of the epoxy resin composition is equivalent to the strength of a pile position, and the epoxy resin composition also has certain toughness, can guarantee that a pile head can bear hammering force during re-hammering and the overall bearing capacity of the pile position is unaffected and is especially applicable to pile head crack repairing; the epoxy resin composition is simple in preparation process, short in curing time and low in cost.

Description

technical field [0001] The invention relates to the technical field of repairing concrete pipe piles, in particular to an epoxy resin composition and its preparation method and application. Background technique [0002] During the construction of the existing prefabricated pipe piles on the construction site, due to geological mutations, irregular construction and other reasons, in the process of sinking the piles, the pile heads often burst or the pile heads are damaged, making it impossible to continue sinking the piles, resulting in the entire If the pile site is scrapped, it is necessary to reset the pile site at a suitable position next to the pile site and repeat the driving. The pipe piles that have been driven into the original pile site are completely wasted and discarded. This not only affects the construction progress and cycle, but also increases a lot of time. cost. [0003] In order to ensure the construction progress and avoid unnecessary economic losses, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00E02D37/00C04B14/06
Inventor 孙纪志罗秋生杨东
Owner 建华建材(肇庆)有限公司
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