Dynamic Concrete Pumping Scholer-Peterson Concrete Related Information

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Experimental Study on Waterproofing Properties of Putty

Jan 28, 2019 · where A s is the cross-sectional area of the strip and A g is the cross-sectional area of the interface groove. To investigate the influence of the precast concrete interface groove on the compression performance of the putty-based composite strip, two typical groove depths of 4 mm and 6 mm were used as shown in Fig. 3.The dimension of the two grooves was 40 × 34 × 4 mm (occupying …

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Effectiveness of diffuse ultrasound for - Semantic Scholar

Abstract The main objective of this research is to investigate the applicability of diffuse ultrasound to the evaluation of distributed micro-cracking damage in concrete. To simulate the micro-cracking damage, polypropylene fibers with very low mechanical characteristics were embedded in concrete specimens, using three different fiber amounts (0, 0.3, and 0.6% by volume) to represent three

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3D Finite Element Modeling of GFRP-Reinforced Concrete

American Concrete Institute Committee 318, "Building code requirements for structural concrete (ACI318-14)," 2014. Google Scholar Andermatt, M. F. and Lubell, A. S. [ 2013 ] " Behavior of concrete deep beams reinforced with internal fiber-reinforced polymer-experimental study," ACI Struct.

Effects of Ultrafine Powders on the Properties of the

May 05, 2020 · The friction at the steel pipe–flowing concrete interface plays an important role in concrete pumpability. To reduce the friction or improve pumpability, in this paper, various ultrafine powders (nanoclay, nano-CaCO 3, and microsized marble powder) are incorporated into a highly flowable concrete mixture with a low water-binder ratio (w / b = 0.35) at a dosage of 1% (by weight) as a cement

STRUCTURAL STEEL DESIGN AND CONSTRUCTION

concrete slab such that the steel and concrete act as one element. Compression – the state, for example in a column or an element of a truss, whereby a member is being shortened by a force. Compression is an axial load that is the opposite of tension. Connection – a …

Strain-Rate-Dependent Constitutive Equations for Concrete

Nov 01, 1998 · Google Scholar. Author and Article Information 1985, Dynamic Response of Concrete and Concrete Structures, Second Annual Technical Report, AFOSR, Contract F49620-83-K007. 15. Malvern, L. E., and Ross, C. A., 1984, Dynamic Response of Concrete and Concrete Structures, First Annual Pipeline Pumping and Compression Systems: A Practical

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Influence of pumping on the resistivity evolution of high

Oct 04, 2021 · When concrete flows in the pipes under certain pumping pressure, the following principle of force balance is satisfied: (1) Δ P  · π r 2 = τ  · 2 π r  · Δ L where ΔP is pressure loss in the pipelines, ΔL is the length of pumping pipe, r is the distance from concrete to the center of the pipe, τ is the shear stress in concrete

Eggshell: Ultra-Thin Three-Dimensional Printed Formwork

Apr 16, 2020 · The most notable of these processes is 3D concrete printing (3DCP), first pioneered as a process called Contour Crafting. 5 Currently, 3DCP is a subject of research at many research institutions and companies worldwide, and the first built examples are appearing. 6–8 Although promising as a large-scale fabrication method due to generally high

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STRUCTURAL STEEL DESIGN AND CONSTRUCTION

concrete slab such that the steel and concrete act as one element. Compression – the state, for example in a column or an element of a truss, whereby a member is being shortened by a force. Compression is an axial load that is the opposite of tension. Connection – a …

[PDF] The Truck Mounted Concrete Boom Pump : A Dynamic

Concrete pump booms are subjected to vibrations that increase mechanical stress and shorten their lifespan. This paper aims to study the problem by considering the two subsystems, the boom and the concrete pump, that have the greatest effect on the phenomenon. The authors supply numerical and experimental tools that can analyze the problem in depth in all its complexity.

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Burj Khalifa – a new high for high-performance concrete

May 02, 2010 · The sampling included C80-20, C80-14 and C60-14 concretes. There was some variation in the results but the average effects of pumping to elevations from 350 m to 580 m was a 2–3°C rise in temperature and a 10% reduction in slump flow. Pumping was found roughly to halve the plastic viscosity of the concrete and double the dynamic yield stress.

Theses and Dissertations Available from ProQuest | Theses

Dissertations & Theses from 2019. Krishnan, Ankita (2019) Understanding Autism Spectrum Disorder Through a Cultural Lens: Perspectives, Stigma, and Cultural Values among Asians . Suzuki, Takakuni (2019) Quantifying the Relations among Neurophysiological Responses, Dimensional Psychopathology, and Personality Traits . Dissertations & Theses from 2018. Abdel-Salam, Ahmed Nabil (2018) …