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Therefore, compressive strength of concrete wedge between the ribs of bar has great impact on the bond strength and is the most determining factor on bond strength (Garcia-Taengua et al., 2016).
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The paper examines the determination of the bond work index (BWI) on finer samples and proposes an equation for the BWI on finer samples. The BWI is a method …
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The interaction between different confinement contributions and their effects on bond were investigated with a novel experimental set-up that removed the parasitic …
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Concrete interfacial roughness plays a great role in contributing to the new-to-old concrete bonding. In this research, artificial roughness was created on the surface of 180-day concrete with iron combs of different-shaped saw-teeth; the morphology data of concrete interface was captured using self-created analysis equipment of laser …
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The use of glass-fiber-reinforced polymer (GFRP) bars as an alternative to steel bars for reinforcing concrete (RC) structures has gained increasing attention in recent years. GFRP bars offer several advantages over steel bars, such as corrosion resistance, lightweight, high tensile strength, and non-magnetic properties. However, there are also …
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The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the required open-side settings (jaw crushers and gyratory crushers) or closed-side settings (cone crushers) for a given product size.P80 = 25400 x …
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Graph and download economic data for Producer Price Index by Industry: Cement and Concrete Product Manufacturing (PCU32733273) from Dec 2003 to Jul 2024 about cement, manufacturing, PPI, industry, inflation, price …
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Cement bond logs (CBLs), a tool not generally used efficiently, can represent the cement quality around a wellbore and be used to identify intervals of poor cement integrity. ... The CBL evaluation tool uses a quantitative bond index method to assign percent bond to wireline log readings based on user defined conditions. Once analyzed, the tool ...
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1. Introduction. Recycled aggregate concrete (RAC), celebrated for its environmentally sustainable properties, has garnered significant attention from both practitioners and scholars in the field of engineering [1].Numerous experimental studies have been undertaken to investigate the properties of RAC, with a particular focus on its …
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Learn how to calculate the Bond Work Index, a measure of the energy required to grind a material, from different tests and size …
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The bond strength between the rebar and concrete is nondimensionalized; thus, the bond strength-slip relationship affected by reinforcement corrosion is established. The non-dimensional method has the following benefits: • Elimination of the effects of other factors such as the size of the specimen, concrete strength, and bond length of the ...
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Berdasarkan rumus bond index diatas, dapat diasumsikan bahwa : a. Attenuation pada zona yang tersemen sempurna dapat diketahui dengan mengasumsikan bahwa kedalaman yang memiliki nilai logging CBL terendah [9] atau nilai attenuation rate tertinggi adalah zona yang tersemen sempurna (100 %). b. Berdasrakan Tabel 1 dan Tabel 2, pembacaan …
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Bond's work index model of quantifying mineral grindability was born out of the desire for a better way of scaling up laboratory grindability test results to industrial-scale grinding mills (Lynch & Rowland, 2005). The Allis-Chalmers company (now ) collected a great deal of operating and laboratory data during the 1930s
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This investigation develops some important data on the mechanical properties, bond strength between concrete and steel rebar, and microstructure of crude oil-soaked Concrete containing silica...
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page 193 CIVL 4135 Development Length Chapter 10. BOND AND ANCHORAGE 10.1. Reading Assignment Chapter 5 of text ACI 318 Chapter 12. 10.2. Introduction Reinforcement for concrete to develop the strength of a section in tension depends on the
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A good concrete bond is achieved when the surface of the concrete is properly prepared, allowing the new concrete to bond effectively to the existing concrete. For example, it is important to remove any dirt, dust, and debris from the existing concrete surface and use a concrete primer to help ensure the best bond. On the other hand, a …
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Cement helps build safe and durable structures and is one of the best choices for environmentally friendly construction. ... These facilitate a high bond strength, ... ASTM D4318 / AASHTO T 90 – Liquid Limit, Plastic Limit, and Plasticity Index of Soils; ASTM D6913 / AASHTO T 88 – Particle-Size Distribution (Gradation) of Soils Using Sieve ...
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"Despite its potential, the cement bond log is probably one of the most abused, misused, and misunderstood logs used in the oil field today. Miscalibration, inadequate information, and a ... Using 2100 psi as the strength for cement, the bond index calculation yields . 0.59 for a system having cement coverage at a strength of 500 psi ...
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The Bond index is used to compare reinforced concrete bond strength; the higher the index, the higher the theoretical bond strength. Thus, the average strength values of the Bond index for each reinforcement allow us to assume that the Bond index of the stainless-steel rebars are far lower than those of the carbon steel B500SD rebars.
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Most epoxy glues for concrete come as two-part systems consisting of an epoxy resin and a hardener. When equal volumes of the resin and hardener are mixed, they react to produce a tough, rigid, high-strength bond. You can use epoxy resin for concrete to repair, fill, bond, and rebuild concrete surfaces.
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In the formulations of the ACI 318, the bond strength is directly proportional to the following confinement term: (5) a + K t r ⌀ ≤ 2. 5 where a is the axis distance to the nearest concrete surface (or half the bar spacing, whichever is less) and K t r is the transverse reinforcement index, similar to the stirrup index of confinement.
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The bond behaviour of steel reinforcement in reinforced concrete elements, including the ultimate bond strength, the load-slip relationships and the effect of different corrosion rates were ...
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The relationship between cementing index and ratio of the bonded cement with cement annulus.  c 360 / 360I ï ±ï€½ ï€ (16) Fig. 8a is the cross plot of bond interface I cementing index with ratio of the bonded cement with cement annulus at 4 different cement densities based on the cased well acoustic field research and ...
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Bigelow, E.L., SPE, Gulf Oil E and P Co.Summary. The cement bond log has been controversial since its inception. Despite its potential, it is possibly the most maligned logging service available to the industry. Effective zone isolation between permeable intervals in a well requires a cement sheath over an appreciable vertical interval. It is …
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A new failure criterion is introduced to predict bond strength of steel rebar in cracked concrete, considering the influence of concrete crack roughness and steel rebar surface features on force transfer at their interface.
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The database contains important factors that impact bond performance, as shown in Fig. 2 and Table 1.The input variables consist of corrosion rate, reinforcement diameter, concrete cover to reinforcement diameter ratio, reinforcement diameter to bond length ratio, reinforcement yield strength, and concrete compressive strength.
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Learn about the factors affecting bond and anchorage of reinforcement in concrete, such as adhesion, shrinkage, friction, and concrete quality. Find the formulas and examples …
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1. Introduction. The issue of architectural aging has emerged as a global concern. Urban renewal and safety repairs represent significant challenges that we are currently addressing [1, 2].In order to enhance the safety and durability of architectural structures, the use of various new concrete materials for the repair of concrete architectures has become a …
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Abstract. In recent years, there has been a strong interest in evaluating casing to cement bond with an LWD sonic tool. In 2013, we presented an amplitude-based approach, similar to what is used with wireline tools with its potential and limitations. During this study, extensive modeling was conducted and verified with real data sets to show …
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This study builds a large database from an extensive survey of existing bond strengths between ultrahigh-performance concrete (UHPC) and normal-strength …
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