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Magnesium phosphate adhesive and application thereof

A technology of magnesium phosphate adhesive and magnesium ammonium phosphate cement, which is applied in construction, building maintenance, building construction, etc., can solve the problems of organic adhesives such as easy aging, poor durability, and changing the net height of floors, so as to improve Carbonation resistance and fire resistance, good fire resistance and durability, to achieve the effect of self-leveling construction

Pending Publication Date: 2021-02-02
SANJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional reinforcement method is to use the method of increasing the section, sticking the steel plate outside, adding steel beams at the bottom of the slab, pasting carbon fiber, and overall replacement. Externally bonded steel plates and pasted carbon fibers can solve the above-mentioned headroom problems and structural stress problems, but organic adhesives are used for bonding with concrete slabs. Organic adhesives are easy to age and have poor durability. In addition, the steel structure needs to be derusted. and fire protection and anti-corrosion treatment, thus increasing the complexity of the construction process; adding steel beams to the bottom of the concrete slab changes the force transmission path of the floor slab and indirectly increases the bearing capacity of the floor slab, but changes the net height of the floor and affects its use functions. Steel structures also face anti-corrosion and fire protection performance If the concrete floor is replaced as a whole, it can completely meet the bearing capacity, structural safety and use function, but it will generate a lot of construction waste, waste raw materials, increase the construction cost, and prolong the construction period
[0004] Looking at the existing reinforcement methods, we can see that the current reinforcement methods have certain limitations.

Method used

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  • Magnesium phosphate adhesive and application thereof
  • Magnesium phosphate adhesive and application thereof
  • Magnesium phosphate adhesive and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A magnesium phosphate adhesive, the magnesium phosphate adhesive includes magnesium ammonium phosphate cement and quartz sand; the weight ratio of the magnesium ammonium phosphate cement to quartz sand is 1:1.

[0040] Wherein, by weight percentage, the magnesium ammonium phosphate cement includes: magnesium oxide powder 64%, ammonium dihydrogen phosphate 25%, composite retarder 11%; the composite retarder includes: borax 46%, phosphoric acid 48% disodium hydrogen, 3% organic acid; the quartz sand includes: 70% of particle size 2-4mm, 30% of particle size 3-5mm.

[0041] refer to Figure 1-2 , the process of the magnesium phosphate adhesive in the reinforcement of the bottom of the concrete floor slab comprises the following steps:

[0042] S1. Carry out roughening treatment on the bottom of the concrete floor slab, remove the dust on the surface of the roughening place, and thoroughly soak the bottom of the slab with water;

[0043]S2. Nail a test block 1 of correspo...

Embodiment 2

[0049] A magnesium phosphate adhesive, the magnesium phosphate adhesive includes magnesium ammonium phosphate cement and quartz sand; the weight ratio of the magnesium ammonium phosphate cement to quartz sand is 1:1.3.

[0050] Wherein, by weight percentage, the magnesium ammonium phosphate cement includes: magnesium oxide powder 59%, ammonium dihydrogen phosphate 30%, composite retarder 10%; wherein, the composite retarder includes: borax 56% , disodium hydrogen phosphate 40%, organic acid 7%; Described magnesium oxide powder comprises mineral admixture, and the content of described mineral admixture is 10% of described magnesium oxide powder weight; Described mineral admixture comprises 60% of fly ash, 40% of metakaolin; the quartz sand includes: 50% of particle size 2-4mm, 70% of particle size 3-5mm.

[0051] Wherein, the magnesium phosphate adhesive also includes sodium silicate with a modulus of 4.0, and the content of the sodium silicate is 1% of the magnesium ammonium p...

Embodiment 3

[0060] A magnesium phosphate adhesive, the magnesium phosphate adhesive includes magnesium ammonium phosphate cement and quartz sand; the weight ratio of the magnesium ammonium phosphate cement to quartz sand is 1:1.2.

[0061] Wherein, by weight percentage, the magnesium ammonium phosphate cement includes: magnesium oxide powder 62%, ammonium dihydrogen phosphate 27%, composite retarder 10.5%; wherein, the composite retarder includes: borax 50% , disodium hydrogen phosphate 45%, organic acid 5%; Described magnesium oxide powder comprises mineral admixture, and the content of described mineral admixture is 30% of described magnesium oxide powder weight; Described mineral admixture comprises 20% fly ash and 80% metakaolin; the quartz sand includes: 60% with a particle size of 2-4mm, and 50% with a particle size of 3-5mm.

[0062] Wherein, the magnesium phosphate adhesive also includes a modulus of 2.8, and the content of the sodium silicate is 3% of the magnesium ammonium phosp...

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Abstract

The invention provides a magnesium phosphate adhesive. The magnesium phosphate adhesive comprises magnesium ammonium phosphate cement and aggregate, wherein a weight ratio of the magnesium ammonium phosphate cement to the aggregate is 1: 1 to 1: 1.3. The invention also discloses application of the magnesium phosphate adhesive. The magnesium phosphate adhesive is endowed with good fluidity throughretarding and plasticizing technologies, so self-leveling during construction is realized, a construction process is simplified, and a construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a magnesium phosphate adhesive and its application. Background technique [0002] After the reinforced concrete structure has been used for a certain number of years, it will be reinforced according to different needs. The reinforced concrete slab is a very important load-bearing structure. The reasons for the reinforcement of the concrete slab mainly include the following points: The thickness of the floor slab does not meet the requirements ; The load is too conservative when designing; the reinforced concrete floor is subject to fire; the strength of the concrete does not meet the requirements, etc. On the basis of maintaining the existing floor slab, firstly, the bearing capacity requirements after structural reinforcement should be ensured; secondly, the headroom requirements used by the owner should be met; finally, the inspection requirements should be met after reinforc...

Claims

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Application Information

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IPC IPC(8): C04B28/34E04G23/02C04B103/22C04B111/20C04B111/22C04B111/28C04B111/62C04B111/72
CPCC04B28/34C04B40/0039C04B2103/22C04B2111/20C04B2111/22C04B2111/28C04B2111/62C04B2111/72E04G23/0237C04B14/304C04B14/06C04B18/08C04B14/106C04B12/04C04B22/0013C04B22/16C04B24/04
Inventor 李涛王继果于清泉吴嵌嵌江召兵宗明明周瑞荣
Owner SANJIANG UNIVERSITY