Zbadanie możliwości zastosowania ministożka do porównawczych pomiarów konsystencji zaczynu i betonu

Ghorab, H. Y.; Sharaky, A. M.; Meawad, A. S.; Salah, H.

Artykuł - szczegóły

Tytuł artykułu

Zbadanie możliwości zastosowania ministożka do porównawczych pomiarów konsystencji zaczynu i betonu

Autorzy

Ghorab H. Y. , Sharaky A. M. , Meawad A. S. , Salah H.

Wybrane pełne teksty z tego czasopisma

http://www.cementwapnobeton.pl/

Identyfikatory

Warianty tytułu

The minislump of the cement pastes with polynapthalene sulfonate as an indicator for the slump behavior of concrete

Języki publikacji

PL EN

Abstrakty

Zbadano wpływ trzech superplastyfikatorów poli(sulfonianów naftalenowych) na konsystencję zaczynów i betonów z cementów: CEM I 42,5 N, odpornego na siarczany oraz portlandzkiego wapiennego (CEM II/B-L). Konsystencję oraz jej zmiany w czasie badano za pomocą mini-stożka i metodą opisaną w normie ASTM C143-08. Otrzymane wyniki wykazały mniejszą lepkość zaczynów z cementu odpornego na siarczany i portlandzkiego wapiennego w porównaniu z CEM I, a więc ze zmniejszeniem zawartości C3A, zgodnie z wynikami innych autorów. Konsystencję początkową i jej zmniejszenie w czasie są w przypadku betonu takie same jak w zaczynie. Ten wynik wskazuje na możliwość, że badania zaczynów z dodatkiem poli(sulfonianu naftalenowego) za pomocą mini-stożka mogą służyć do oceny konsystencji betonu i jego zmian w czasie.

Three commercial polynaphthalene sulfonalte superplasticizers were used to study their effect on the slump behavior of cement pastes made of CEM 142.5 N, sulfate resisting and Portland limestone (CEM II/B-L) cements as well as on the respective concretes. The initial slump and the slump loss of the paste and concrete were measured by means of the minislump test and according to ASTM C-143-08 respectively. The results obtained confirm the increased flowability of the pastes made of sulfate resisting and Portland limestone cements, compared to that of CEM I, thus with the decrease of C3A conltenlt, as reported in the literature. The fluidity start and the slump retention of concrete are found to follow the same trend of the pastes. This results suggest that the minislump test carried out on cement pastes with polynaphthalene sulfonate superplasticizers can be a successful indicator for the slump retention behavior of the respective concrete.

Słowa kluczowe

zaczyn cementowy mieszanka betonowa urabialność rozpływ badanie porównawcze badanie ministożkiem superplastyfikator naftalenowy

cement paste concrete mix workability slump comparison test miniature slump test naphthalene superplasticizer

Wydawca

Fundacja Cement, Wapno, Beton

Czasopismo

Cement Wapno Beton

Rocznik

2015

Tom

R. 20/82, nr 3

Strony

162--170

Opis fizyczny

Bibliogr. 35 poz., il., tab.

Twórcy

autor

Ghorab H. Y.

Faculty of Science, Helwan University

autor

Sharaky A. M.

Institute of African Research and Studies, Cairo University

autor

Meawad A. S.

Faculty of Science, Helwan University

autor

Salah H.

Institute of African Research and Studies, Cairo University

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikator YADDA

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