Affiliation:
1. Anna University, Chennai
2. Adhiparasakthi Engineering College
Abstract
Abstract
The strength evaluation of concrete can be determined by destructive and Non-destructive methods. In recent years construction industry initiated using demolition waste in structural concrete and due to this action coarse aggregate cost has been reduced. By using pre-treatment method of recycled coarse aggregate (RCA), the concrete properties will increase. Thus, the RCA are treated by using mechanical scrubbing and acid treatment (H2SO4 & HCl) before induced in concrete. Slump value for controlled concrete with river sand and M-sand was 110mm and 100mm. For untreated recycled aggregate concrete, the slump value reduced to 70mm and it is improved by using mechanical scrubbing treated aggregate concrete by 90mm without addition extra water. Similarly, Vee-bee consist meter test and Compaction factor test results were reduced suddenly while using untreated aggregate concrete; it was improved by all treatment methods especially by mechanically scrubbing techniques. The compressive strength for untreated aggregate concrete at 28 days is 16.83 N/mm2 and it was improved by mechanical scrubbing by 22.68 N/mm2.The strength was increased by mechanically treated aggregate concrete by 25.79% on compared with untreated aggregate concrete. The rebound numbers of treated RAC were improved by 12.5-26.31% at 28 days than RAC (UN). The ultrasonic pulse velocity in different treatments of RAC was improved by 8.17 – 22.82% at 28 days than RAC (UN). Impact resistance also enhanced by using treated recycled aggregate.
Publisher
Research Square Platform LLC
Reference54 articles.
1. A sustainable pavement concrete using warm mix asphalt and hydrated lime treated recycled concrete aggregates;Albayati A;Sustainable Mater Technol,2018
2. Rebound hammer test to predict in-situ strength of concrete using recycled concrete aggregates, brick chips and stone chips;Anindya SS;Constr Build Mater,2020
3. Influence of Nano-Silica on the properties of recycled aggregate concrete;Bibhuti BM;Constr Build Mater,2014
4. Bureau of Indian Standards (1959) “Indian standard methods of tests for strength of concrete.” IS 516–1959, New Delhi, India
5. Bureau of Indian Standards (1963) “Indian standard methods of tests for aggregate for concrete.” IS 2386(Part1-8)-1963, New Delhi, India