Essentials of Law and Ethics for Pharmacy Technicians, 2nd Edition

Neville, Judith

doi:10.1177/875512250702300616

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two essential material properties, namely, compressive strength and modulus of elasticity, are inevitably used in the design of concrete structures. Tese two properties are highly related to concrete mix design, handling, compaction, and curing conditions [1]. Compressive strength (f c ′ ) and modulus of elasticity (E c ) are usually obtained from destructive tests of standard concrete specimens in the laboratory [2].…”

Section: Introductionmentioning

confidence: 99%

A Baseline‐Free Electromechanical Impedance Resonance Method for Measuring the Modulus of Elasticity of Concrete Cubes Using Surface‐Bonded PZT Patches

Sha,

Zhu

2024

Structural Control and Health Monitoring

View full text Add to dashboard Cite

The modulus of elasticity of concrete (Ec) is an essential parameter commonly used in concrete design, concrete curing monitoring, and deterioration evaluation and damage detection of concrete structures. A quick and reliable in situ determination of Ec helps in accurate decision-making for construction and maintenance. The electromechanical impedance (EMI) technique using surface-bonded lead zirconate titanate (PZT) patches (referred to as SBP) has become a popular nondestructive method for monitoring concrete structures due to ease of operations. The existing research mainly utilized baseline-dependent approaches to monitor the changes (e.g., hardening or damage evolution) of concrete structures. However, relevant baselines are greatly influenced by the status of PZT sensors and bonding layers, limiting the practical applications of this technique. This paper presents a baseline-free EMI resonance method for measuring Ec of concrete without using prior baseline data for the first time. Numerical and experimental studies on standard concrete cubes (100 mm in width) with SBP were conducted to examine the proposed method. A dimensionless physical quantity was first proposed to view the EMI signals. Then, resonance peaks highly related to concrete properties but insensitive to the status of the sensor system were selected, physically described, and correlated to the concrete parameters through numerical analyses. Finally, experimental validations, covering the measurement of Ec, repeatability of the chosen resonance peaks, and temperature effects, were conducted to illustrate the proposed method’s stability, accuracy, and sensitivity.

show abstract

Section: Introductionmentioning

confidence: 99%

A Baseline‐Free Electromechanical Impedance Resonance Method for Measuring the Modulus of Elasticity of Concrete Cubes Using Surface‐Bonded PZT Patches

Sha,

Zhu

2024

Structural Control and Health Monitoring

View full text Add to dashboard Cite

show abstract

“…Self-compacting concrete, distinguished for its exceptional flowability and stability, possesses the unique capability to effortlessly spread and occupy designated spaces within formwork without requiring consolidation or significant segregation (Hardik et al, 2011). This innovative blend, commonly termed Self-Compacting Concrete, effectively expels entrapped air through a vibration-free process and adeptly maneuvers around obstacles, including reinforcement, to achieve optimal filling within the formwork (Neville & Brooks, 2010). With the advent of rapid industrialization and technological progress, a considerable amount of waste materials, notably non-biodegradable plastic waste, is generated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Waste Metalized Plastic Fibers and Guinea-Corn Husk Ash on Strength Properties of Self-Compacting Concrete

H.,

M. M.

2024

KJSET

View full text Add to dashboard Cite

Green concrete is a form of eco-friendly composite material that is manufactured using waste material as one of its components. Guinea corn husk ash (GCHA) and waste metalized plastic (WMP) are all by-products that are nuisance to the environment. It is important to understand their influence on workability and mechanical properties of self-compacting concrete (SCC). In this study, the influence of waste metalized plastic fibre (WMPF) and Guinea corn husk ash (GCHA) on workability and mechanical properties of SCC was investigated. The concrete was designed to attain a characteristic strength of 40 N/mm2. The chemical composition of the GCHA was determined by X-Ray Fluorescence (XRF) method. Properties studied include slump flow test on fresh concrete in addition to compressive strength, direct tensile strength and microstructure of the hardened concrete. Seven concrete mixtures containing 0% - 1.5% WMPF of size 2mm width by 20mm length were cast. A second batch of concrete mixes containing the same fibre dosages and 5% GCHA as substitute of Ordinary Portland cement (OPC) were also cast. All concrete cast were cured and tested for 7-days, 28-days and 91-days for both compressive and direct tensile strengths. The result show that there was a reduction of slump flow due to inclusion of WMPF and GCHA in all the concrete mixes. Also, the compressive strength of both mixes reduced with the increase in the fibre content. There was an enhancement of the direct tensile strength due to inclusion of WMPF. The compressive strength of 5% GCHA-based concrete reduced at 7 and 28 days curing period and witnessed a high gain of strength at 91-days curing period. In conclusion, the compressive strength of both OPC-based and 5% GCHA-based concretes without fibre were found to be 52.42 N/mm2 and 58.27 N/mm2 respectively at 91 days of curing.

show abstract

“…As well, some of these factors have an inverse relation with creep, such as aggregate content [4], age of loading [5,6,7], the volumesurface ratio [8], and ambient relative humidity [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Other factors have positive relation with creep, like water-cement ratio [4], stress/strength ratio [11,12,13,14], temperature [7] and water content in cement paste at time of loading [15]. Among the previously mentioned factors, temperature is considered one of the most important one that affects the creep of concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Change in Ambient Temperature on Creep of Concrete

Kammouna¹

2021

CEBACOM

View full text Add to dashboard Cite

This article reviews the studies on the effect of temperature on the creep of concrete. Indeed, the temperature is one of the most important factors, as its rise leads to an acceleration of creep of concrete and thus an increase in its value compared to concrete under normal temperature. However, creep increases significantly if concrete under load is exposed to a high temperature. Thus, the creep value becomes higher than that of concrete exposed to a constant temperature (of the same level). Unfortunately, some of the codes for predicting creep of concrete (for instance the Eurocode) do not take into account the effect of high temperature on the creep of concrete under load. To clarify the impact of heating concrete under load (on creep) and distinguish it from its effect where it is constant, this study was carried out.

show abstract

Essentials of Law and Ethics for Pharmacy Technicians, 2nd Edition

Cited by 3 publications

References 0 publications

A Baseline‐Free Electromechanical Impedance Resonance Method for Measuring the Modulus of Elasticity of Concrete Cubes Using Surface‐Bonded PZT Patches

A Baseline‐Free Electromechanical Impedance Resonance Method for Measuring the Modulus of Elasticity of Concrete Cubes Using Surface‐Bonded PZT Patches

Influence of Waste Metalized Plastic Fibers and Guinea-Corn Husk Ash on Strength Properties of Self-Compacting Concrete

Effect of Change in Ambient Temperature on Creep of Concrete

Contact Info

Product

Resources

About