LRC - JUIT

DS57 Low-Temperature Pumpability Characteristics of Engine Oils in Full-Scale Engines: 31. DS58 Evaluation of the Elevated Temperature Tensile and Creep-Rupture Properties of 3 to 9 Percent Chromium-Molybdenum Steels: 32. DS59 Evaluations of the Elevated Temperature Tensilde and Creep-Rupture Properties of 12 to 27 Percent Chromium Steels: 33.

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Publications | NIST

Apr 08, 2021 · Metrology Needs for Predicting Concrete Pumpability. The prediction of concrete service life is of paramount importance for upgrading our nation s built infrastructure. The scope of this chapter is to introduce the current technology for measuring the rheological properties of concrete. The need to evaluate or assess the flow properties

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NEW GENERATION OF CHEMICAL ADMIXTURES FOR …

fluid concrete. Since complicated factors affect concrete when fresh concrete is passing through a pump line it is essential to use the rheology approach to evaluate and predict pumpability in regard to fluidity, viscosity, resistance to slip and segregation (Kwon et al. 2011).

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Predicting pumpability and shootability of crushed

Jan 01, 2016 · 3.2. Pumpability Predictions Based on Rheological Properties. Figure 11 graphically summarizes the results of pumpability prediction for each WMS mixture, in which the area surrounded by the red dotted lines is the "pumpable" zone identified by the previous study [1].

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Virtual Concrete in Real Time| Concrete Construction Magazine

Apr 20, 2009 · The concrete industry has been approaching mix designs and material selection in practically the same way for decades. But should this change? Do you dream of how to improve your quality control program? Would you like to know how a new source of cement or aggregate will affect concrete pumpability without doing lots of slump tests?

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Metrology Needs for Predicting Concrete Pumpability

Jun 22, 2015 · Metrology Needs for Predicting Concrete Pumpability 1. Introduction. Concrete pumping has become one of the most widely used approaches to place concrete. Pumping enables 2. Background. Pumping is increasingly utilized as an efficient and economical method to place concrete …

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State of the Art on Prediction of Concrete Pumping

Jun 16, 2016 · Large scale constructions needs to estimate a possibility for pumping concrete. In this paper, the state of the art on prediction of concrete pumping including analytical and experimental works is presented. The existing methods to measure the rheological properties of slip layer (or called lubricating layer) are first introduced. Second, based on the rheological properties of slip layer and

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CI3906 Ferraris | Rheology | Shear Stress

Pumpability Limiting variations in concrete properties for a job Two major problems can occur during concrete pumping . requiring high and National Institute of Standards and Hamilton, H.T., "Metrology Needs for Predicting Concrete Pumpability," Technology (NIST ). She is Chair of ACI Advances in Materials Science and

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Report No. K-TRAN: KSULiming Best Practices for Concrete

research evidenceas to what affects concrete pumpability and how pumping changes concrete properties. A three-phase research study was carried out to (1) investigate performance of pumped concrete in field conditions, (2) identify concrete properties affecting pumpability, and (3) assess the effects of pumping on concrete air void system.

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(PDF) Metrology Needs for Predicting Concrete Pumpability

Metrology Needs for Predicting Concrete Pumpability Myoungsung Choi, 1 Chiara F. Ferraris, 2 Nicos S. Martys, 2 Didier Lootens, 3 Van K. Bui, 4 and H. R. Trey Hamilton 5

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Practical Tribometer to Estimate Pumpability of Fresh Concrete

Journal of Asian Architecture and Building Engineering/May 2010/236 229 Practical Tribometer to Estimate Pumpability of Fresh Concrete Tien-Tung Ngo*1, El-Hadj Kadri2, François Cussigh3, Rachid Bennacer4 and Roger Duval4 1 Doctor, Laboratory L2MGC, University of Cergy Pontoise, France 2 Associate Professor, Laboratory L2MGC, University of Cergy Pontoise, France

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What Aggregate Packing is Optimal?

Compacted Aggregates Total Concrete Volume Concrete is a suspension of aggregates in paste. finishability and pumpability . Segregation resistance . Strength and stiffness . What purpose you need 2) Accuracy with respect to these purposes 3) Data input needed for accurate results: particle size distribution and shape

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State of the Art on Prediction of Concrete Pumping

Abstract: Large scale constructions needs to estimate a possibility for pumping concrete. In this paper, the state of the art on prediction of concrete pumping including analytical and experimental works is presented. The existing methods to measure the rheological properties of slip layer (or called lubricating layer) are first introduced.

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Difficult Concrete Mixtures| Concrete Construction Magazine

Oct 11, 2012 · Difficult Concrete Mixtures. Modern concrete mixtures are designed to fulfill many functions on a project. Traditionally, engineers are most concerned with the compressive strength for design purposes and contractors are most concerned with slump for placement reasons. As concrete technology continues to develop, the use of modern concrete

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How affect the pipe length of pumping circuit on concrete

May 30, 2019 · This means that the pumpability of concrete can be evaluated up to 1000 m even if the pumping test is carried out only with a pipe length of 200 m. Download : Metrology needs for predicting concrete pumpability. Adv. Mater. Sci. Eng. (2015), pp. 1-10. CrossRef Google Scholar.

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Academia.edu - Share research

Metrology Needs for Predicting Concrete Pumpability; Metrology of the burr amount-correlation with blanking operation parameters (blanked material–wear of the punch) Metrology of the burr and the punch wear in blanking process of copper alloy thin sheet; Metrology of silicide contacts for future CMOS

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10.1016/j.cemconres.2009.07.005 | 10.1016/j - DeepDyve

Jun 11, 2020 · To predict pumpability of a certain concrete mix in a specific pumping set-up, the complex relation between concrete rheology and pumpability needs elucidation. In addition there are various physical phenomena involved. In [1,12,13] two different flow mechanisms were proposed; plug/slip- and/or shear flow.

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Consortium on "Concrete Rheology: Enabling Metrology

Apr 30, 2012 · The goal of the CREME consortium is to predict the pumpability of a grout/mortar or a concrete from the rheological properties of the materials and the geometry/material of the pipe. This goal will be achieved by developing test methods and models to measure and predict the performance parameters of grout.

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Aggregates for Concrete - Memphis

Recycled concrete, or crushed waste concrete, is a cannot alone provide a basis for predicting the behavior of aggregates in service. Visual inspection will often disclose pumpability, economy, poros-ity, shrinkage, and durability of concrete. Variations in grading can seriously affect the uniformity of concrete

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Academia.edu - Share research

Metrology Needs for Predicting Concrete Pumpability; Metrology of the burr amount-correlation with blanking operation parameters (blanked material–wear of the punch) Metrology of the burr and the punch wear in blanking process of copper alloy thin sheet; Metrology of silicide contacts for future CMOS

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