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Enhancement method of porous coral aggregate

A coral and aggregate technology, which is applied in the field of porous coral aggregate reinforcement, can solve the problems of reducing the cement slurry’s cohesive force, difficulty in immersing in elongated pores, and poor operability, so as to reduce water absorption, low processing cost, and increase workability effect

Active Publication Date: 2020-04-10
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem: The purpose of the present invention is to overcome the deficiencies in the prior art and provide a porous, high-water-absorbing coral aggregate enhancer to solve the problem of poor encapsulation and difficulty in immersing in slender coral aggregate pores in traditional coral aggregate pore improvement methods. Problems of porosity, poor operability, and reduced cohesion with cement paste improve the performance of coral concrete and increase the application range of coral concrete

Method used

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  • Enhancement method of porous coral aggregate

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Effect test

Embodiment 1

[0044] Step 1: Use a jaw crusher to crush the coral aggregates, sieve the coral aggregates with a particle size of 10mm, and dry the coral aggregates at 105°C for 24 hours; after drying, immerse the coral aggregates in water The glass modulus is 3.5 and the Baume degree is 40% in an airtight container containing sodium water glass, and at the same time, the coral aggregate is oscillated by an ultrasonic oscillator to discharge the gas in the coral aggregate; after soaking for 2 hours, the coral aggregate is sealed. Take it out of the container, wipe the surface clean, and put it into a 105°C oven for water glass dehydration treatment. After 6 hours, the dehydrated coral aggregates were taken out, soaked in saturated calcium chloride solution for 12 hours, and then taken out and placed in an 80°C oven for drying for 6 hours. Soak the coral aggregate in sodium water glass solution for 2 hours again, take it out and dry it, then soak it in saturated calcium chloride solution for ...

Embodiment 2

[0048] Step 1: a method for enhancing porous coral aggregates, using a jaw crusher to crush the coral aggregates, sieve the coral aggregates with a particle size of 10mm, and dry the coral aggregates at 105°C for 24 hours; Then, put the coral aggregates into a closed container, use a vacuum pump to extract the air in the container to 0.01 standard atmosphere, and then immerse the coral aggregates in the enhancer A in the closed container, that is, the water glass modulus is 2.5, wave Mido is 35% sodium-containing water glass; after soaking for 8-12 minutes, take out the coral aggregate from the airtight container, wipe the surface clean, and put it in an 80 ℃ oven for water glass dehydration treatment. After 6 hours, take out the dehydrated coral aggregate, put it into the enhancer B, that is, soak it in a saturated calcium chloride solution for 12 hours, take it out and put it into an 80°C oven for drying. The coral aggregates were soaked in sodium water glass solution for 2 ...

Embodiment 3

[0052] Step 1: Use a jaw crusher to crush the coral aggregates, sieve the coral aggregates with a particle size of 10mm, and dry the coral aggregates at 105 ° C for 24 hours; after drying, immerse the coral aggregates in a container. The modulus of water glass is 3, and the Baume degree is 45%. The water glass contains potassium, and at the same time, the coral aggregate is oscillated by an ultrasonic oscillator to discharge the gas in the coral aggregate; after soaking for 1.5 hours, the coral aggregate is placed in an airtight container. Take it out, wipe the surface clean, put it in a 105°C oven for water glass dehydration; take out the dehydrated coral aggregate after 7 hours, put it in the enhancer B, that is, soak it in saturated calcium chloride solution for 10 hours, take it out and put it in Dry in an oven at 80°C for 5 hours. The coral aggregate was soaked in potassium water glass solution again for 2.5 hours, taken out and dried, then soaked in saturated calcium chl...

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Abstract

The invention discloses a porous coral aggregate enhancement method, and belongs to the technical field of applications of building materials. The method comprises following steps: grinding porous coral aggregate, soaking grinded porous coral aggregate in an enhancing agent (A), expelling gas in the pores by using ultrasonic vibration or a vacuum pump, taking out the coral aggregate, drying the coral aggregate in a baking oven, then soaking the coral aggregate in an enhancing agent (B), taking out the coral aggregate, drying, repeating the process for multiple times, then mixing an enhancing agent (C) with water, and then wrapping the coral aggregate by the solution to obtain enhanced coral aggregate. The processing cost is low. The method is nontoxic and harmless. Deep and long holes andbent holes of coral aggregate can be fulfilled and blocked. The water absorption is obviously reduced. The workability of coral aggregate is enhanced. The density and strength of coral aggregate are improved. The cylinder compressive strength is increased by 80%. The anti-cracking performance of coral aggregate is strong, and the acid-resistant and wet / dry resistant cycle performance is strong.

Description

Technical field: [0001] The invention relates to the technical field of building material application, in particular to a method for enhancing porous coral aggregates. Background technique: [0002] Aggregate is an important part of concrete materials. For marine superstructures and island buildings, the existing aggregates are mainly continuous graded stones with good grain shape and hard texture, with a particle size of 25mm and below, which are used in ordinary concrete. Ordinary concrete is not only expensive to transport, but also easily restricted by meteorological and marine environment (such as typhoon) and other conditions, so local materials are an effective way to obtain aggregates. Coral reefs are calcareous rocks mainly composed of coral debris and marine animal debris. Its calcium content reaches 90% and is widely distributed around coral islands or reefs. The bulk density of coral rough bones is 900kg / m 3 , the apparent density is 1800kg / m 3 , the porosity...

Claims

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Application Information

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IPC IPC(8): C04B20/12C04B14/28
CPCC04B14/28C04B20/12C04B20/1074C04B20/1077
Inventor 尹世平梁向州成帅安刘双苏讯董朋杰
Owner CHINA UNIV OF MINING & TECH
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