Abstract
This article presents the results of a study dealing with the utilization of sludge water from a concrete plant as a partial replacement for mixing water in the production of cement composites. The replacement of mixing water with sludge water from a concrete plant was carried out in the amounts of 20% and 50%. The following tests were carried out in order to determine the effect of the replacement of mixing water with sludge water from a concrete plant on the physical and mechanical properties of the cement composites: cement mortar consistency, beginning and end of setting, strength characteristics (compressive strength and flexural strength), and thermal properties. The measured values of the strength characteristics of the test specimens after 28 days of age confirm the possibility of replacing mixing water with sludge water from a concrete plant without significantly reducing the compressive and flexural strength.
Highlights
Reducing the impact of industry on the environment is an integral part of today’s life
The results of other studies show that the use of sludge water from concrete plants in concretes based on fly ash and concretes without fly ash with the addition of superplasticizer resulted in a reduced consistency of the concrete mixture during a slump test
The results have shown that the strength of concrete prepared using sludge water was comparable to the strength of concrete prepared from mixing water not containing sludge water
Summary
Reducing the impact of industry on the environment is an integral part of today’s life. The results of other studies show that the use of sludge water from concrete plants in concretes based on fly ash and concretes without fly ash with the addition of superplasticizer resulted in a reduced consistency of the concrete mixture during a slump test. It was found that sludge the water from concrete plants had a significant impact on the effect of the superplasticizing additive [3]. There are experimental and statistical studies comparing concretes and mortars prepared with a certain amount of sludge water from a concrete plant, the results of which have shown that sludge water significantly affected neither the workability of the concrete mix prepared using this method, nor the subsequent strength of the concrete [4,5]. There are new sustainable technologies being developed for the purpose of the recycling of fresh concrete waste [7], where even fresh concrete waste with a high content of calcium silicate was classified as a cement paste and used as a medium capturing CO2 [8], similar to the use of sludge from waste water treatment plants [9]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
