scholarly journals Influence of Granulometry of the Small Aggregate on the Permeability of Wall Cement Coating

2019 ◽  
Vol 6 (11) ◽  
pp. 425-431
Author(s):  
Kaylla Gomes Mesquita ◽  
Pedro Felix Liotto ◽  
Fabrício Rodrigues Amorim ◽  
Sara dos Santos Santarém ◽  
David Barbosa de Alencar
Keyword(s):  
Small Aggregate

In vitro inhibitory effect of sarpogrelate hydrochloride on serotonin-induced platelet small-aggregate formation

2000 ◽  
Vol 60 (2) ◽  
pp. 81-86 ◽  
Author(s):  
Akira Suehiro ◽  
Mikio Marumo ◽  
Hiroshi Yoshimoto ◽  
Satoshi Higasa ◽  
Eizo Kakishita
Keyword(s):  
Inhibitory Effect ◽  
Aggregate Formation ◽  
Small Aggregate ◽  
Sarpogrelate Hydrochloride

Selection of penstemide and serrulatoloside producing clones in penstemon serrulatus by small-aggregate cloning

1990 ◽  
Vol 9 (7) ◽  
pp. 378-381 ◽  
Author(s):  
Halina Wysokińska ◽  
Nguyen Thi Xuan Giang
Keyword(s):  
Small Aggregate ◽  
Selection Of

What is the optimal rate of disinflation to be targeted in the czech economy?

2001 ◽  
Vol 10 (2) ◽  
Author(s):  
Lavan Mahadeva ◽  
Kateřina Šmídková
Keyword(s):  
Inflation Targeting ◽  
Optimal Rate ◽  
Monetary Transmission ◽  
Economic Variables ◽  
Policy Rules ◽  
Small Aggregate ◽  
Alternative Policy ◽  
Inflation Targets ◽  
Forward Looking

What is the optimal rate of disinflation to be targeted during transition? This question has attracted more attention under the inflation-targeting regime than under other monetary strategies, because explicit inflation targets are used to anchor expectations. These targets signal what rate of disinflation is targeted by policymakers. Deciding what level of disinflation is least costly in terms of the volatility of important economic variables is not straightforward, since costs depend on monetary transmission in a given economy. In this paper, a small, aggregate, forward-looking model of Czech monetary transmission is used to compare the consequences of different disinflation strategies that are approximated with alternative policy rules. Our results suggest that trajectories with a more linear tendency are superior to trajectories that postpone disinflation or reduce inflation suddenly.

scholarly journals ESTUDO DO TEOR DE SUBSTITUIÇÃO DE AGREGADO MIÚDO POR RESÍDUO DE BORRACHA EM ARGAMASSA DE CIMENTO E CAL [ Study of the replacement content of small aggregate by rubber residue in cement and lime mortar ]

2018 ◽  
Vol 14 (2) ◽  
Author(s):  
Mônica Navarini Kurz ◽  
Charlei Marcelo Paliga ◽  
Ariela da Silva Torres
Keyword(s):  
Tensile Strength ◽  
Mechanical Behavior ◽  
Construction Industry ◽  
Axial Compression ◽  
Compression Strength ◽  
Capillary Absorption ◽  
Lime Mortar ◽  
Small Aggregate ◽  
Substitution Ratio ◽  
And Performance

RESUMO: O setor da construção civil vem absorvendo resíduos e transformando-os em componentes para utilização nas construções, especialmente através da incorporação em materiais como argamassas e concretos. Com o crescente número de veículos automotivos, ocorreu um aumento na produção de pneus e, consequentemente, de seus resíduos. Portanto, o presente estudo tem o objetivo de avaliar o melhor teor de substituição de agregado miúdo por resíduo de borracha em argamassa de cimento e cal, a partir da comparação com uma argamassa de referência, analisando o comportamento físico e mecânico. Para verificar a melhor relação de substituição, os ensaios foram realizados em argamassa referência (traço 1:2:9) e em argamassas com resíduos nas proporções de 2,5%, 5%, 10% e 15% de substituição de areia por borracha. Para caracterização das argamassas foram realizados ensaios de índice de consistência, resistência à compressão axial, resistência à tração por compressão diametral, absorção por capilaridade e absorção por imersão. Os resultados indicam que nas argamassas com resíduo ocorreu um aumento na relação a/c para se manter a trabalhabilidade e um decréscimo nas resistências. Além de, uma diminuição na absorção por capilaridade e um aumento na absorção por imersão. Apesar de provocar mudanças no comportamento da argamassa, aponta-se o uso desse resíduo como alternativa viável, tanto ambiental quanto de desempenho.ABSTRACT: The construction industry has been absorbing and transforming them into components for use in construction, especially through the incorporation of materials such as mortars and concretes. With the increasing number of automotive vehicles, there has been an increase in the production of tires and, consequently, of their waste. Therefore, the present study has the objective of evaluating the best content of substitution of small aggregate by rubber residue in cement and lime mortar, from the comparison with a reference mortar, analyzing the physical and mechanical behavior. To verify the best substitution ratio, the tests were performed in reference mortar (trace 1:2:9) and mortar with residuals in the proportions of 2.5%, 5%, 10% and 15% of Sand for rubber. To characterize the mortars, tests of consistency index, axial compression strength, tensile strength by diametrical compression, capillary absorption and immersion absorption were performed. The results indicate that in the mortars with residue an increase in the w/c ratio was observed to maintain the workability and a decrease in the resistances. In addition to, a decrease in capillary absorption and an increase in absorption by immersion. Although it causes changes in mortar behavior, the use of this residue is indicated as a viable alternative, both environmental and performance.

scholarly journals Re-entrainment of small aggregate particles from a plane surface by air stream.

1980 ◽  
Vol 13 (2) ◽  
pp. 143-147 ◽  
Author(s):  
YASUO KOUSAKA ◽  
KIKUO OKUYAMA ◽  
YOSHIYUKI ENDO
Keyword(s):  
Plane Surface ◽  
Small Aggregate ◽  
Air Stream ◽  
Aggregate Particles

scholarly journals Filamentous aggregates are fragmented by the proteasome holoenzyme

2018 ◽  
Author(s):  
Rachel Cliffe ◽  
Jason C Sang ◽  
Franziska Kundel ◽  
Daniel Finley ◽  
David Klenerman ◽  
...  
Keyword(s):  
Atpase Activity ◽  
26S Proteasome ◽  
General Mechanism ◽  
Aggregation Process ◽  
Human Cell Lines ◽  
Small Aggregate ◽  
Amyloidogenic Proteins ◽  
Distinct Structure ◽  
Significant Toxicity

AbstractFilamentous aggregates (fibrils) are regarded as the final stage in the assembly of amyloidogenic proteins and are formed in many neurodegenerative diseases. Accumulation of aggregates occurs as a result of an imbalance between their formation and removal. Although there have been numerous studies of the aggregation process in vitro, far fewer studies of aggregate disassembly and degradation are available. Here we use single-aggregate imaging to show that large fibrils assembled from full-length tau are substrates of the 26S proteasome holoenzyme, which fragments them into small aggregates. TEM further revealed that these small aggregate species had no distinct structure. The intact proteasome holoenzyme is required to effectively target fibrils. Interestingly, while degradation of monomeric tau was not inhibited by ATPγS, fibril fragmentation was predominantly dependent on the ATPase activity of the proteasome. The proteasome holoenzyme was also found to target fibrils assembled from α-synuclein (αS), suggesting that its fibril fragmenting function may be a general mechanism. The fragmented species produced by the proteasome showed significant toxicity to human cell lines compared to intact fibrils. Together, our results indicate that the proteasome holoenzyme possesses a novel fragmentation function that disassembles large fibrils into smaller and more cytotoxic species.

The Influence of the Coarse Aggregate Size on Mechanical Properties of Reinforced Concrete Beams

2012 ◽  
Vol 184-185 ◽  
pp. 696-700
Author(s):  
Hong Quan Sun ◽  
Jun Ding
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Coarse Aggregate ◽  
Concrete Beams ◽  
Aggregate Size ◽  
Plane Section ◽  
Reinforced Concrete Beams ◽  
Static Loads ◽  
Small Aggregate ◽  
Normal Section

This paper gives the influence of the coarse aggregate size on the mechanical properties of the beam with different coarse aggregate sizes under static loads. In the research, three reinforced concrete beams with three different coarse aggregate sizes separately are tested. The stains and the deflections of the beams under the static loads are measured. The results show that under the action of the same loads, the maximum strains of the reinforced concrete beams with the big and the small aggregate size separately are larger than that of the beam with mixed aggregate size, and the deflection of the beam with the big aggregate size is larger than that of the beam with small aggregate size. In the loading process, the changes of the normal section strain of the reinforced concrete beams are satisfied the assumption of the plane section.

scholarly journals Waste tires and the burning of sugarcane bagasse in the manufacture of concrete pavers (pavers)

2019 ◽  
Vol 12 (3) ◽  
pp. 608-637
Author(s):  
S. P. S. ALTOÉ ◽  
A. SALES ◽  
C. H. MARTINS
Keyword(s):  
Compressive Strength ◽  
Natural Resources ◽  
Sugarcane Bagasse ◽  
Abrasion Resistance ◽  
Partial Replacement ◽  
Natural Sand ◽  
Small Aggregate ◽  
Sugarcane Bagasse Ash

Abstract The research developed has the purpose of analyzing the potential utilization of sugarcane bagasse ash and tire residue in the construction of pavers in replacement of the small aggregate, the natural sand. In order to achieve this objective, the methodology adopted includes steps such as: characterization of the residues to be used, preparation of pavers with different contents of partial replacement of small aggregates, determination of the main pavers characteristics (compressive strength, water absorption, abrasion resistance) . The results proved the viability of the substitution, and the optimum content for the manufacturing of the parts is 27%, being 25% of BCC and 2% of tires. The contribution of the research is focused on reducing the consumption of natural resources and the correct disposal of the residues studied.

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