Study on stability of self-compacting concrete applied for filling layer structure from paste, mortar and concrete

• Autorzy: Liu He , Zhang Jingyi , Yang Yanhai

Identyfikatory

DOI

10.24425/ace.2022.141899

• Języki publikacji: EN

Abstrakty

EN

Self compacting concrete (SCC) filling layer is core structure of China rail track system (CRTS) ? type ballastless track. Construction quality, service performance and durability of CRTS ? ballastless structure are affected by stability of SCC for filling layer. In this study, the stability of SCC of filling layer is researched at three levels as paste, mortar and concrete by theory and experiment. Evaluation indices including bleeding (B), surface bubble rate (θ), thickness of paste (𝜎paste) and thickness of surface mortar (L) are proposed based on the theoretical calculation and analysis. The threshold viscosity of paste 0.394 Pa·s and mixture satisfied area are obtained at paste level based on the relationship between viscosity and B, θ of paste. The mixture satisfied area was defined at mortar level under criterions of maximum value of 𝜎paste and slump flow. Optimal range of gap between neighboring aggregates (λca) 12.4 mm-14.1 mm is chosen by flow ability, passing ability, stable ability of SCC. These research results will help to further understand the stability of SCC.

Słowa kluczowe

EN

stability; self-compacting concrete; filling layer; plastic viscosity; mix composition

PL

stabilność; beton samozagęszczalny; warstwa wypełniająca; lepkość plastyczna; skład mieszanki

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2022
• Tom: Vol. 68, nr 3
• Strony: 501--522
• Opis fizyczny: Bibliogr. 45 poz., il., tab.

Twórcy

autor

Liu He

• Shenyang Jianzhu University, School of Transportation and Geometics Engineering, Shenyang, China

• https://orcid.org/0000-0002-3867-0726

autor

Zhang Jingyi

• Shenyang Urban Construction University, School of Civil engineering, Shenyang, China

• https://orcid.org/0000-0003-4641-5191

autor

Yang Yanhai

• Shenyang Jianzhu University, School of Transportation and Geometics Engineering, Shenyang, China

• https://orcid.org/0000-0002-1599-7873

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).