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High-performance reinforcing agent for pile and preparation method thereof

A reinforcing agent and high-performance technology, which is applied in the field of chemical building materials and construction, can solve problems such as the impact on the durability of finished pipe piles, and achieve the effects of good cohesion, uniform and stable air-entrainment, and high water-reducing rate

Active Publication Date: 2012-11-21
FUJIAN KZJ NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent Publication Nos. CN101348346 and CN 101348347 respectively discuss a preparation method of a new plasticizer for pipe piles, but it uses a common polycarboxylate water reducer and incorporates a large amount of inorganic mineral components. The introduction of a large amount of sulfate ions or nitrite ions will actually have a certain impact on the durability of the finished pipe pile
There are no related reports on the preparation of amphoteric polycarboxylate superplasticizers by introducing amide groups into the molecular structure through the acylation reaction process

Method used

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  • High-performance reinforcing agent for pile and preparation method thereof
  • High-performance reinforcing agent for pile and preparation method thereof
  • High-performance reinforcing agent for pile and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Amidation reaction: Add 60g of urea, 117.6g of maleic anhydride (or 139.2g of fumaric acid), and 2.66g of concentrated sulfuric acid into a four-neck flask, start the stirring device, and keep the temperature at 85°C for 2 hours to obtain amide small monomer.

[0028] (2) Copolymerization reaction: Weigh 48.0 g of small amide monomers, 6.4 g of sodium vinyl sulfonate and 160 g of TPEG with a molecular weight of 2500, and add them together with 100 g of water into a four-necked flask, and keep the temperature at 50°C. An aqueous solution of ammonium persulfate (5.36g ammonium persulfate+40g water) and an aqueous solution of isopropanol (1.07g isopropanol+40g water) were added dropwise, the time for adding was 2 hours, and the temperature was kept constant for 1.5 hours after the addition.

[0029] (3) Neutralization: cool down to 45°C, adjust the pH value in the range of 6.0 to 7.0 with sodium hydroxide, and obtain a colorless or light yellow clear solution with a co...

Embodiment 2

[0033] (1) Amidation reaction: Add 180 g of urea, 259.2 g of acrylic acid, and 11.0 g of p-toluenesulfonic acid into a four-necked flask, start the stirring device, and keep the temperature at 70° C. for 4 hours to obtain small amide monomers.

[0034] (2) Copolymerization reaction: Weigh 30.0 g of small amide monomers, 11.0 g of sodium vinyl sulfonate and 200 g of TPEG with a molecular weight of 10,000, add them together with 110 g of water into a four-necked flask, and keep the temperature at 70°C. The aqueous solution of hydrogen peroxide (32.1g30% hydrogen peroxide+30g water), the aqueous solution of sodium formate (3.62g sodium formate+60g water) were added dropwise respectively, the time for adding was 2 hours, and the temperature was kept constant for 4 hours after the addition.

[0035] (3) Neutralization: cool down to 45° C., adjust the pH value in the range of 6.0 to 7.0 with calcium hydroxide, obtain a colorless or light yellow clear solution with a concentration of ...

Embodiment 3

[0037] (1) Amidation reaction: Add 120kg of urea, 206.4kg of methacrylic acid, and 6.53kg of sulfamic acid into a 1000L reaction kettle, start the stirring blade, and keep the temperature at 80°C for 3 hours to obtain amide small monomers.

[0038](2) Copolymerization reaction: Weigh 281.6kg of small amide monomers, 105.6kg of sodium vinyl sulfonate and 1760kg of TPEG with a molecular weight of 8000, and add them into a 5000L reactor along with 800kg of water, and keep the temperature at 60°C. Add dropwise the aqueous solution of sodium azobisisobutylamidine hydrochloride (96.6kg sodium azobisisobutylamidine hydrochloride+500kg water), the aqueous solution of isooctyl 3-mercaptopropionate (23.6kg isooctyl 3-mercaptopropionate+ 500kg water), the time for dropping was 2 hours, and the temperature was kept constant for 2.5 hours after the dropping.

[0039] (3) Neutralization: the temperature is lowered to 45° C., and the pH value is adjusted in the range of 6.0 to 7.0 with potas...

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Abstract

The invention discloses a high-performance reinforcing agent for a pile and a preparation method thereof. The reinforcing agent takes unsaturated acid, urea, TPEG (alkylene polyoxyethylene polyoxypropylene ether) and the like as major chemical synthesis raw materials. Amidation and copolymerization processes are performed under certain condition under the actions of a catalyst, an initiator, a chain transfer agent and the like, so that a high polymer with an amphiphathic structure is obtained. Hydrophilic hydroxyl, carboxyl, amide groups and sulfonic groups, a hydrophobic carbon chain and a polyoxyethylene polyoxypropylene ether long chain structure with a certain steric hindrance effect exist in the molecular structure of the reinforcing agent. The reinforcing agent is suitable for preparing concrete for prestressed high-performance concrete (PHC) pipe piles.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials construction, and in particular relates to a high-performance reinforcing agent for piles and a preparation method thereof. Background technique [0002] Prestressed high-strength concrete pipe pile (referred to as PHC pipe pile) is a high-strength concrete product that has developed rapidly and is widely used in recent years. It has high strength grades, large bearing capacity, good impact resistance, and convenient construction. It is widely used in industrial and civil buildings such as high-rise buildings, long-span bridges, expressways and port terminals in the Pearl River Delta, Yangtze River Delta, Bohai Bay and other coastal areas. [0003] Due to the superior performance characteristics and high technical indicators of PHC pipe piles, high technical requirements are put forward for the concrete raw materials, mix ratio and production of PHC pipe piles. As an indispens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C04B24/26
Inventor 温庆如郭鑫祺方云辉蒋卓君林添兴于飞宇麻秀星曾冲盛
Owner FUJIAN KZJ NEW MATERIALS CO LTD
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