Resumen Está firmemente demostrada la importancia de realizar mantenimiento preventivo en los edificios, para evitar que se degraden y aparezcan lesiones graves. También está demostrado que con el mantenimiento preventivo se ahorra dinero frente al mantenimiento correctivo. En el marco del mantenimiento cabe decir que, para realizar las inspecciones periódicas de los edificios, es de gran utilidad el poder cuantificar hasta qué punto las deficiencias existentes son graves o no, con objeto de facilitar la toma de decisiones y priorizar las intervenciones terapéuticas. De hecho, se han utilizado y utilizan numerosas escalas diferentes entre sí para valorar el grado de gravedad de los elementos constructivos. Pero no existe consenso común y estas escalas son diferentes entre sí según el estudio a que pertenezcan. Por ejemplo, en las diferentes normas ITE existentes en España se utilizan diferentes escalas y formas de valorar las deficiencias existentes y no hay consenso común en el método de valoración. El objetivo del presente artículo es proponer, en base a un largo y riguroso proceso metodológico, una escala que sirva para valorar el grado de gravedad de los daños en edificios, que pueda ser utilizada de manera generalizada. Abstract The importance of performing preventive maintenance on buildings is clearly demonstrated, in order to prevent them from deterioration and severe damages. It is also demonstrated that preventive maintenance saves money versus corrective maintenance. In the framework of maintenance, to make periodic inspections of the buildings is useful to quantify the extent to which deteriorations are severe or not, in order to facilitate decision making and prioritize interventions. To this purpose many scales have been used and are used to assess the severity of damage and deterioration of the building components. But it appears evident that there is not common consensus and these scales are different between them, according to the study they belong to. Everything referred shows the need to propose and validate a scale that serves to assess the degree of severity of construction elements in buildings, which is widely used. Therefore, the objective of this article is to propose, based on a long and rigorous methodological process, a scale that serves to assess the degree of severity of damage in buildings, which can be widely used.
Estudio experimental sobre la influencia de la temperatura ambiental en la resistencia del hormigón preparado. Bases teóricas Experimental study of the effect of temperature on the strength of ready-mixed concrete. TheoryMater.
RESUMO. Esta pesquisa propõe-se a estudar o comportamento da aderência entre o concreto auto-adensável de alta resistência (CAAAR) e as armaduras de aço. Compara-se este comportamento de aderência com aquele do concreto adensado mecanicamente de alta resistência (CAMAR), na idade de 7 dias. Relaciona-se ainda estes comportamentos com a resistência mecânica (resistência à compressão e à tração) e o módulo de elasticidade dos concretos em estudo, na mesma idade. A aderência entre os concretos e a armadura de aço de conformação superficial nervurada é determinada através de ensaios de flexão, com carregamento monotônico de curta duração. A análise dos resultados permite concluir que o CAAAR e o CAMAR apresentam praticamente o mesmo comportamento de aderência.Palavras-chave: aderência concreto-armadura, concreto autoadensável de alta resistência, concreto adensado mecanicamente de alta resistência.ABSTRACT. Bond between high strength self-compacting concrete and reinforcement steel bar. The main purpose of this research is to study the bond performance between high strength self-compacting concrete (HSSCC) and reinforcing steel bar. It's compared with the bond performance of high strength mechanical compacted concrete (HSMCC), reference, for age of seven days. It's purposes to make a list of theses performances with compressive strength, traction strength and elasticity modulus. The bond performance between these concretes and deformed reinforcing steel bar are determined using beam test, in the condition of monotonic and short duration loading. The analysis and interpretation of the results permits to conclude that the HSSCC presents the same performance of the HSMCC.
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