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Compatibility between base concrete made with different chemical admixtures and...
Pinheiro-Alves, M.ª Teresa; Sequeira, Ana Rita; Bettencourt Ribeiro, AntónioMany cases of cracking and detachment of the concrete surface have appeared in concrete floors where surface hardeners were used in Portugal. The main causes for cracking and delamination of trowelled concrete pavements are several and it is essential to control bleeding and the time available to perform the finishing operations. Several base concretes were made with different chemical admixtures and one type o...
Compatibility between a quartz surface hardener and different base concrete mix...
Pinheiro-Alves, M.ª Teresa; Fernandes, André; Bettencourt Ribeiro, AntónioMany cases of cracking and detachment of the concrete surface have appeared in concrete floors, namely pavements where surface hardeners were used, especially in car parks, industrial areas and warehouses. This paper studies the behaviour of ten different base concretes mixtures made with two chemical admixtures and four additions, when a quartz surface hardener is applied. The objective is to identify the rele...
INFLUÊNCIA DO BETÃO DE BASE EM PAVIMENTOS COM APLICAÇÃO DE ENDURECEDORES DE SUP...
Marques, Maria João; Pinheiro-Alves, M.ª Teresa; Bettencourt Ribeiro, AntónioEm Portugal e noutros países têm ocorrido frequentemente algumas situações anómalas em pavimentos com aplicação de endurecedores de superfície em betões de base, principalmente em zonas industriais e parques de estacionamento. A fissuração e o destacamento da camada superficial do betão estão entre as principais anomalias encontradas. O uso crescente de fortes redutores de água no betão e de ligantes cada vez m...
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