APPLICATION OF ACCELERATORS AND HARDENING RETARDANTS IN THE CONCRETE MAN-UFACTURE TECHNOLOGY
Keywords:accelerator, retarder, plasticizer, superplasticizer, hyperplasticizer, complex additive, binder, filler, concrete, properties.
Have been performed the scientific literature review and analysis, directed on studying the application of some hardening accelerators and retarders, including additives of complex action (plasticizers, etc.), in the technology of concrete`s manufacturing for various purposes. Have been shown the influence and dependences of properties indicators changes cement`s paste and concrete`s on the type and quantity of additives (carboxymethylcellulose; silicate-lumps; CaCl2, KCl, K2SO4 salts; aluminum sulfate; sodium sulfate; sulfate-sodium mixture; as well as brands: Гексалит А; Лигнопан Б2; Мобет 1; Одолит-К; Polyplast СП-1; Релаксон; Реламикс; Реламикс Т 2; С-3; Стахемент 2000 М; Стахемент NS; Стахемикс; Стахефрост; Супер ПК; ТЕМП Ж45; Centrament Rapid 680; Glenium ACE; Glenium ACE 430; Melflux 1641F; Melflux 2641F4 Muraplast FK 48; Muraplast FK 63; Reamin MF-100; Reomax PC-750; Sika Plast-2089 LF; Sika Plast 2135; Sika Plastiment BV 3M; Sika Plastiment Stayer; SikaâRapid 1; Sika Visco Crete 24 HE; Sika Visco Crete 3190; Sika Visco Crete 5 New; Sika Visco Crete 5-600SP; Weiss Rapid; Weiss SM; X-SEED 1000). Has been shown the effectiveness of certain hardening accelerators influence on the setting time (beginning and end) cement`s paste and the compressive strength concrete`s samples. Has been given an efficiency of some accelerators and plasticizers application in terms of concrete`s properties and samples from it. It has been noted that the joint use of some hardening accelerators and plasticizers allows reducing water demand while maintaining the same-mobility of concrete, as well as increasing the compressive strength of concrete samples. Have been shown data on the effectiveness of plasticizer (including super and hyper) and hardening accelerators solutions by freezing temperature. Have been shown technological expediency, efficiency and perspective of hardening accelerators and retarders use in concrete`s technology manufacturing in terms of improving its quality and reliability, improving the performance of lining.
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