Adequate selection of material constituents and test methods are necessary for workability specifications and performance of hardened concrete. An experimental program was performed to evaluate the suitability of various test methods for workability assessment and to propose performance specifications of prestressed concrete. In total, 33 self-consolidating concrete (SCC) mixtures made with var...

One of the leading schools in modern unemployment theory is the "Structuralist" theory of the "natural" or equilibrium rate of unemployment (NRU) started by Edmund S. Phelps (see Blanchard 2000, p. 255; Phelps 1994, 2005b; Fitoussi et al. 2000; Phelps and Zoega 2004). In fact, it can be understood as a kind of meta-theory of unemployment (Phelps 2002). In a nutshell, Structuralist theory postul...

Abstract In this paper, the effects of three kinds steel fibers with different aspect ratios on slump, compressive intensity, and splitting tensile strength concrete were studied. The results show that slump for fiber-based polished reduces amount admixture foundation. larger length diameter is reduced at same volume admixture. intensity cleavage mixed are increased to degrees than vegetal one....

Concrete mixture design for concrete slump test has many characteristics and mostly noisy. Such data will affect prediction of machine learning. This study aims to experiment on H2O Deep Learning framework Bagging noisy overfitting avoidance create the Slump Model. The consists cement, blast furnace slag, fly ash, water, superplasticizer, coarse aggregate, fine age, slump, compressive strength....

Self-compacting concrete is a fluid mixture suitable for placing in structures with congested reinforcement without vibration. Self-compacting concrete development must ensure a good balance between deformability and stability. Also, compactibility is affected by the characteristics of materials and the mix proportions; it becomes necessary to evolve a procedure for mix design of SCC. The paper...

The relatively poor economic performance of the St. Louis metropolitan area is alleged to have had important consequences for local employment opportunities. Since it is generally thought that the area’s depressed economy was due to the slump in automobile production, many commentators are pinning their pr-ojections for a recovery in the labor market on the current expansion in the area’s auto ...

O objetivo deste artigo é analisar a viabilidade de utilização blocos intertravados concreto, com agregados reciclados resíduos construção e demolição, para pavimentação. Primeiro, foi produzido concreto seco, o qual conhecido por apresentar slump-zero, sendo necessária máquina vibro-prensa compactação desforma imediata. Assim, quatro misturas REF-0.63, REF-0.73, 50CDW-0.63 50CDW-0.73 (os dois ...