Scholarlink

A concrete mixture that has been used successfully for some time, can suddenly exhibit unpredictable and undesirable effects due to changes in the cement composition during production or due to a change in the cement manufacturer or supplier for a construction project. The change in the composition of cement, along with the addition of admixtures (specifically superplasticizers) leaves concrete mixes vulnerable to inconsistent behaviour and possibly incompatibilities. This study aims to identify the components that leave a mix prone to inconsistent behaviour and the consequences thereof in practice. It was found that the C3A and alkali content in clinkers are of high importance when faced with inconsistent behaviour. These components influence a mix’s compatibility with sulphates and superplasticisers, as well as its slump flow and set times characteristics.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Factors Leading to Inconsistent Slump and Setting Behaviour of Concrete Using Different Clinkers, Sulphates and Superplasticizers

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Carla van Wyk,
  • Lorna Stone,
  • Riaan Combrinck

摘要

A concrete mixture that has been used successfully for some time, can suddenly exhibit unpredictable and undesirable effects due to changes in the cement composition during production or due to a change in the cement manufacturer or supplier for a construction project. The change in the composition of cement, along with the addition of admixtures (specifically superplasticizers) leaves concrete mixes vulnerable to inconsistent behaviour and possibly incompatibilities. This study aims to identify the components that leave a mix prone to inconsistent behaviour and the consequences thereof in practice. It was found that the C3A and alkali content in clinkers are of high importance when faced with inconsistent behaviour. These components influence a mix’s compatibility with sulphates and superplasticisers, as well as its slump flow and set times characteristics.