Due to non-availability of river sand, crushed sand is being used for producing all types of concrete including SCC. This is a real time on site experience at one of the project where SCC is being produced on large scale.
The challenge is to make SCC concrete using crushed aggregates. Coarse aggregates having different specific gravities and different absorption characteristics. The most critical is the Crushed sand having varying percentage of fines. This percentage of fines affects the initial workability as well as the retention posing a challenge to make a stable concrete mix and robust admixture.
Admixture plays a very Self consolidating concrete admixture manufacturers role in making Self Compacting Concrete. Introduction Self compacting concrete is an innovative concrete that does not require vibration for placing and compaction.
It is able to flow under its own weight, completely filling formwork and achieving compaction, even in the presence of congested reinforcement. The hardened concrete is dense, homogenous and has the same engineering properties and durability as traditional vibrated concrete.
The special characteristics of SSC concrete with the available material is achieved by proper mix
Self consolidating concrete admixture manufacturers and a robust admixture.
Main challenges for making SCC is the use crushed aggregates. Crushed aggregates having numerous flat or elongated particles will produce less workable concrete. The crushed sand is the major concern for producing quality concrete. A Self consolidating concrete admixture manufacturers component PC based robust admixture to give required flow characteristic and viscosity was developed.
Several mixes were tried with different combinations.
To evaluate the rheology of the mixes, the viscosity of the mixes were checked by V funnel test and yield stress was by flow table, the T values were observed. And a single component admixture which will give the desired properties and retention period was using the PCE technology. Different combination of polymers high water reducers and slump keeping were tried to get the required properties at 3 without affecting the setting time of the concrete a special VMA was inbuilt in the admixture to maintain the desired rheology throughout the retaining period.
PCE are tailor made versatile polymers, which are designed to achieve unique requirements like adsorption speed, Self consolidating concrete admixture manufacturers water reduction with high workability, slump flow retention without
Self consolidating concrete admixture manufacturers, giving stability to the mix by maintaining the viscosity.
Conclusion Admixtures play very important role for making and retaining the properties of SSC for desired period even with crushed sand Self consolidating concrete admixture manufacturers varying fine particles. Log into your account. Monday, November 19, Pancheswar Multi Purpose Dam Project.
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