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Application of a modified sulfur in improving the compressive strength, anti-corrosion and/or anti-permeability of sulfur concrete and sulfur mortar

The technology of sulfur concrete and sulfur mortar, which is applied in the field of building materials, can solve the problems of poor corrosion resistance, permeability resistance and acid corrosion resistance of silicate concrete, and achieve excellent acid corrosion resistance and permeability resistance, The effect of good integrity and easy access to materials

Active Publication Date: 2020-05-08
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The corrosion resistance and penetration resistance of ordinary Portland concrete are often poor, such as extremely poor acid corrosion resistance

Method used

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  • Application of a modified sulfur in improving the compressive strength, anti-corrosion and/or anti-permeability of sulfur concrete and sulfur mortar
  • Application of a modified sulfur in improving the compressive strength, anti-corrosion and/or anti-permeability of sulfur concrete and sulfur mortar
  • Application of a modified sulfur in improving the compressive strength, anti-corrosion and/or anti-permeability of sulfur concrete and sulfur mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation of high-strength modified sulfur concrete, in terms of mass percentage, sulfur is 15% of the total mass, wherein the modifier DCPD accounts for 3% of the sulfur mass, cement accounts for 13.5% of the total mass, and river sand accounts for 20.5% of the total mass, Granite coarse aggregate accounts for 51% of the total mass.

[0035] Step 1: Melt the sulfur at 140°C, then weigh 3% of its mass of DCPD and add it to react for 2 hours.

[0036] Step 2: At 140°C, uniformly mix the modified sulfur obtained in Step 1 with the corresponding preheated cement filler.

[0037] Step 3: At 140°C, add preheated river sand and granite to the mixture obtained in Step 2, stir evenly, vibrate for 60 seconds, pour into the preheated cast iron test mold, and disassemble after cooling at room temperature for 1 day mold.

[0038] The 3d compressive strength of this modified sulfur concrete specimen reaches 82.5MPa, and the mixture has good fluidity.

Embodiment 2

[0040] Preparation of high-strength modified sulfur mortar, in terms of mass percentage, the sulfur content is 24% of the total mass, wherein the modifier DCPD accounts for 3% of the sulfur mass, cement accounts for 21.6% of the total mass, and river sand accounts for 54.4% of the total mass .

[0041] Step 1: Melt the sulfur at 140°C, then weigh 3% of its mass of DCPD and add it to react for 2 hours.

[0042] Step 2: At 140°C, uniformly mix the modified sulfur obtained in Step 1 with the corresponding preheated cement filler.

[0043] Step 3: At 140°C, add preheated river sand to the mixture obtained in Step 2, stir evenly, vibrate for 60 seconds, pour into the preheated cast iron test mold, and remove the mold after cooling at room temperature for 1 day.

[0044] The 3d compressive strength of this modified sulfur mortar specimen reaches 62.3MPa, and the flexural strength reaches 11.9MPa.

Embodiment 3

[0046] This experiment is a study on the permeability of modified sulfur concrete and modified sulfur mortar. The ASTM C1202 standard test method, that is, the electric flux method, is used to comprehensively evaluate the chloride ion permeability resistance of ordinary concrete, modified sulfur concrete, and modified sulfur mortar. Cured to 28d age under standard conditions, the modified sulfur concrete was cured at room temperature for 1d, then taken out, placed in a vacuum saturation device, vacuumed for 3h, then pumped with water for 1h, and then soaked for 18h. The cathode and anode of the specimen are respectively equipped with 3% NaCl solution and 0.3mol / L NaOH solution, and then apply a DC voltage of 60V in the axial direction of the concrete specimen, and record the Q value of the electricity passing through the specimen within 6 hours. It is used to measure the compactness of concrete and the ability to resist chloride ion penetration. According to the ASTM C1202 st...

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Abstract

The invention discloses an application of modified sulphur to improvement of compressive strength, corrosion resistance and / or penetration resistance performance of sulphur concrete or sulphur mortar.Modified sulphur is formed by a modifier dicyclopentadiene modified sulphur; The modified sulphur concrete comprises the following raw materials in percentages by mass: 15-20% of modified sulphur, 12-27% of a filling material, 50-60% of stone, and 18-28% of sand; the modified sulphur mortar comprises the following raw materials in percentages by mass: 20-37% of modified sulphur, 15-48% of the filling material, and 50-75% of sand. Compared with silicate concrete, the modified sulphur concrete and modified sulphur mortar have extremely good compressive strength, acid corrosion resistance and / orpenetration resistance, in the preparation process, water and maintenance are not needed, coagulation speed is extremely fast, and pouring work can be carried out in a freezing environment; the gelling material sulphur is a petroleum by-product, and the material can be completely recycled and reused.

Description

technical field [0001] The invention belongs to the field of building materials, and more specifically relates to an application of modified sulfur in improving the compressive strength, corrosion resistance and / or permeability resistance of sulfur concrete and sulfur mortar. Background technique [0002] Sulfur concrete is a thermoplastic building material that uses sulfur as a cementitious material. After the molten sulfur is mixed with fillers and aggregates, as the sulfur solidifies, the mixture cools and quickly gains strength. Due to the characteristics of high strength, low permeability, acid and alkali resistance, fatigue resistance, and fast setting, sulfur concrete is widely used in infrastructure construction such as civil, industrial, and transportation in the world. [0003] The corrosion resistance and penetration resistance of ordinary Portland concrete are often poor, such as extremely poor acid corrosion resistance. In cities and industrial production areas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/36C04B111/20
Inventor 欧阳东
Owner JINAN UNIVERSITY
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