Method for enhancing workability of concrete

Abstract

The invention provides a method for enhancing workability of concrete. A technical scheme of the invention is that a workability improving agent with hydrophilic colloid as a main component is added into the concrete to enhance workability of the concrete. Adding the workability improving agent with hydrophilic colloid as the main component into the concrete can reduce sensitivity of water reducer to aggregate, improve concrete holding phenomenon during strong concrete pumping, reduce concrete pumping pressure, so as to endow better construction performance on the concrete.

Description

technical field

[0001] The invention relates to a method for improving the comprehensive performance of concrete, in particular to a method for improving the workability of concrete. Background technique

[0002] Water reducer has become an indispensable fifth component in concrete, and more and more attention has been paid to it. Polycarboxylate superplasticizer is a kind of superplasticizer with better comprehensive performance. Its high water reducing rate and good slump retention are beyond the reach of previous naphthalene or aliphatic water reducers. . In China, polycarboxylate superplasticizers have developed rapidly due to their excellent performance, but polycarboxylate superplasticizers also have many shortcomings, because most of the performance of polycarboxylate superplasticizers mainly depends on the performance of the masterbatch Bad performance makes the compounding of polycarboxylate superplasticizer easier, but when encountering problems, it becomes impos...

Examples

Embodiment 1

[0022] The first step: carrageenan solution preparation:

[0023] Put 1g of carrageenan powder into a 100ml beaker, first add about 10g of warm water and stir, with the stirring, the carrageenan gradually becomes a very viscous paste, then add about 10g of warm water and stir, repeat the above steps until adding About 50g of warm water until the solution does not look like a paste, then add 50-100g of warm water and stir to reduce the viscosity, then transfer the solution to a 1000ml beaker, add water to dilute to 1000g, and make a concentration of 0.1%.

[0024] Step Two: Add Carrageenan to Concrete:

[0025] Take 4.7Kg of PO42.5 cement, 0.5Kg of fly ash, 6.3Kg of medium sand, 11Kg of gravel, 1.65Kg of water, 55g of 20% polycarboxylate superplasticizer PC, and then take the 0.1% carrageenan solution prepared in the first step 5.5g, added to a single-shaft forced concrete mixer and stirred to prepare C50 high-grade concrete.

technical field

[0001] The invention relates to a method for improving the comprehensive performance of concrete, in particular to a method for improving the workability of concrete. Background technique

[0002] Water reducer has become an indispensable fifth component in concrete, and more and more attention has been paid to it. Polycarboxylate superplasticizer is a kind of superplasticizer with better comprehensive performance. Its high water reducing rate and good slump retention are beyond the reach of previous naphthalene or aliphatic water reducers. . In China, polycarboxylate superplasticizers have developed rapidly due to their excellent performance, but polycarboxylate superplasticizers also have many shortcomings, because most of the performance of polycarboxylate superplasticizers mainly depends on the performance of the masterbatch Bad performance makes the compounding of polycarboxylate superplasticizer easier, but when encountering problems, it becomes impos...

Examples

Embodiment 1

[0022] The first step: carrageenan solution preparation:

[0023] Put 1g of carrageenan powder into a 100ml beaker, first add about 10g of warm water and stir, with the stirring, the carrageenan gradually becomes a very viscous paste, then add about 10g of warm water and stir, repeat the above steps until adding About 50g of warm water until the solution does not look like a paste, then add 50-100g of warm water and stir to reduce the viscosity, then transfer the solution to a 1000ml beaker, add water to dilute to 1000g, and make a concentration of 0.1%.

[0024] Step Two: Add Carrageenan to Concrete:

[0025] Take 4.7Kg of PO42.5 cement, 0.5Kg of fly ash, 6.3Kg of medium sand, 11Kg of gravel, 1.65Kg of water, 55g of 20% polycarboxylate superplasticizer PC, and then take the 0.1% carrageenan solution prepared in the first step 5.5g, added to a single-shaft forced concrete mixer and stirred to prepare C50 high-grade concrete.