详情

COURSE OF TEMPERATURE IN STRUCTURAL LIGHTWEIGHT CONCRETES DURING HARDENING

项目名称：	COURSE OF TEMPERATURE IN STRUCTURAL LIGHTWEIGHT CONCRETES DURING HARDENING
摘要：	HIGHER INCREASES IN TEMPERATURE ARE TO BE EXPECTED FROM THE HEAT OF HYDRATION IN LIGHTWEIGHT CONCRETE THAN FOR NORMAL CONCRETE DUE TO ITS LOWER GROSS DENSITY AND THEREFORE LOWER HEAT CAPACITY AND CONDUCTANCE. IN ORDER TO FIND OUT HOW FAR THE ENFORCED STRAINS AND CRACK FORMATION ARE UNFAVOURABLY AFFECTED THE TEMPERATURE CURVES AND THE ENFORCED STRAINS HAVE BEEN ESTABLISHED FOR TWO LIGHTWEIGHT CONCRETES (AGGREGATE: EXPANDED SLATE OR CLAY) SHORTENING OF THE COOLING PERIOD BEING PREVENTED. FOR COMPARISON, THE SAME TYPE OF TEST SPECIMENS OF NORMAL CONCRETE WERE EXAMINED UNDER THE SAME TEMPERATURE AND STORAGE CONDITIONS. EVALUATION OF THE TEST RESULTS SHOWED THAT WITH UNHINDERED DEFORMATION IN THE CASE OF LIGHTWEIGHT CONCRETE, DESPITE THE HIGHER TEMPERATURE INCREASES, THERE WAS NO INCREASED TENDENCY TO CRACK COMPARED WITH NORMAL CONCRETE. WITH COMPLETE PREVENTION OF DEFORMATION IN THE CASE OF LIGHTWEIGHT CONCRETES A GREATER DROP IN TEMPERATURE WAS REQUIRED FOR CRACK FORMATION THAN WITH NORMAL CONCRETE.
状态：	Completed
资助组织：	DEUTSCHER AUSSCHUSS FUER STAHLBETON (GERMAN REINFORCED CONCRETE COMMITTEE)
项目负责人：	WEIGLER
执行机构：	TECHNISCHE HOCHSCHULE DARMSTADT, INST. FUER MASSIVBAU (DARMSTADT TECHNICAL UNIV., INST. FOR MASSIVE CONSTRUCTION)
开始时间：	19690207
实际结束时间：	19710000
主题领域：	Construction；I32: Concrete