Drying shrinkage and creep properties of self-compacting concrete with expansive agent and viscosity modified admixture

• Autorzy: Liu He , Duan Guangchao , Zhang Jingyi

Identyfikatory

DOI

10.24425/ace.2022.141901

• Języki publikacji: EN

Abstrakty

EN

Self-Compacting Concrete (SCC) has been widely used in the filling layer of high-speed railways. The quality of the filling layer directly affects the durability, comfort, and safety of the track system. In this study, shrinkage characteristics and the creep behavior of SCC were investigated by compressive creep tests and shrinkage tests. They were performed on specimens with different loading levels with a calcium sulfoaluminate-based expansive agent (UEA) and viscosity modified admixture (VMA). Furthermore, based on the scanning electron microscope (SEM) morphology of hydration products and X-ray diffraction (XRD) analysis, the influence of admixtures on microstructure and mineral phases of SCC was analyzed. The results show that when concretes were loaded with the same stress level, the main factor influencing creep of SCC was the quantity and microstructure of amorphism and hydration crystal. The XRD and SEM result showed that UEA and VMA make the creep and shrinkage of SCC reduce obviously as the cementitious system grow many crystals in hydration products. The creep of NC was less than SCC with identical compressive strength. At the same time, the addition of UEA can improve the ability to resist drying shrinkage.

Słowa kluczowe

EN

self-compacting concrete; expansive agent; UEA; viscosity modified admixture; creep; drying shrinkage

PL

beton samozagęszczalny; środek ekspansywny; UEA; domieszka o zmodyfikowanej lepkości; pełzanie; skurcz suszenia

• 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: 539--551
• Opis fizyczny: Bibliogr. 31 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

Duan Guangchao

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

• https://orcid.org/0000-0002-6195-4065

autor

Zhang Jingyi

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

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

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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).