STUDY ON PRECEDING MORTAR IN THE CONCRETE PUMPING PRACTICE RECYCLED FOR WASTE FRESH CONCRETE : Reuse of waste fresh concrete as a preceding mortar for concrete pumping

Abstract

Reuse of waste fresh concretes can contribute the resource saving and control of industrial wastes emission. This study deals with an application of the waste fresh concrete as a preceding mortar of the subsequent concrete pumping construction. Addition of super set-retarding agents and superplasticizers to the waste fresh concrete and subsequent wet-screening results in the Eco-Mortar whose basic properties are presented. Recovery factor of the Eco-Mortar as a function of screening mesh size and effect of the chemical admixtures on the quality of the Eco-Mortar are discussed in this paper.