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### High-Strength Stabilized Base Thickness Design Procedure

High-strength stabilized base materials are "cementitiously sta bilized'' coarse-grained materials characterized by high-strength and modulus properties. Typical HSSB materials are pozzolanic stabilized mixture (PSM), cement aggregate mixture, and similar types

Learn More### Estimation of fracture properties for high strength and

Feb 14, · Estimation of fracture properties for high strength and ultra high strength concrete beams and size effect A Ramachandra Murthy, BK Raghu Prasad, and Nagesh R Iyer International Journal of Damage Mechanics 22 : 8 , 1109-1126

Learn More### Strength estimation model for high-strength concrete

A mathematical model is presented for estimating compressive strength of high-strength concrete incorporating pozzolanic materials, based on the strength of a control ordinary Portland cement (OPC) concrete made with similar mixture characteristics and curing history.

Learn More### Application of Adaptive Neuro-Fuzzy Inference System in

High Strength Concrete (HSC) is an especial type of concrete For ANFIS based soft sensor models, when estimation/prediction accuracy is concerned, it is assumed that both the data used to train the model and the testing data to make estimations are free of errors (Klein and Rosin, 1999),

Learn More### CHAPTER 3: REINFORCING STEEL MATERIAL MODEL

strain demands; while the compressive strength and stiffness provided by surrounding concrete limits compressive strain demands (Figure 3.1). Thus, an appropriate experimen-tal strain history for use in development of a material model for longitudinal reinforce-ment includes significant tensile strain demands accompanied by moderate compressive

Learn More### PDF Performance issues for high strength concrete in

To achieve high strength concrete, the aggregates have to be tested for strength. strength and about 65 percent of ultimate strength for normal strength concrete and high.

Learn More### High Strength Concrete — What, why, & how? - Nevada Ready Mix

WHY Do We Need High Strength Concrete? To put the concrete into service at much earlier age, for example opening the pavement at 3-days. High strength concrete mixtures will have a high cementitious materials content that increases the heat of hydration and possibly higher shrinkage

Learn More### Constitutive Model for Confined High Strength Concrete

The paper presents a constitutive model developed for high strength concrete with uniform lateral confinement subjected to cyclic axial compression. It is based on the testing program carried out for normal and high strength concrete. Compressive strengths of concrete at the time of testing were 44, 58, 83, and 106 MPa.

Learn More### ABSTRACT Title of dissertation: CHARACTERIZATION OF

The next generation of concrete, Ultra-High Performance Concrete (UHPC), exhibits exceptional strength and durability characteristics that make it well suited for use in highway bridge structures. This material can exhibit compressive strength of 28 ksi, tensile strength of 1.3 ksi, significant tensile toughness, elastic modulus of 7600 ksi, and

Learn More### Comparison of Tension Stiffening Models for High Strength

Proceedings of the World Congress on Civil, Structural, and Environmental Engineering (CSEE’16) Prague, Czech Republic – March 30 – 31, Paper No. ICSENM 109 DOI: 10.11159/icsenm16.109 ICSENM 109-1 . Comparison of Tension Stiffening Models for High Strength Concrete

Learn More### Numerical Analysis of High Strength Concrete Beams using

concrete of higher strength. As per our Indian standard IS 456: 2000 concretes are grouped as ordinary concrete, standard concrete and high strength concrete as given in Table 1. The code did not describe about UHSC, but the American Concrete Institute (ACI) categories the concrete as Normal Strength Concrete (NSC), High

Learn More### Estimation of Compressive Strength of High Strength Concrete

For the estimation of compressive strength using concrete core specimens, three different concrete core diameters were examined: 30, 50, and 100 mm. The compressive strength of a concrete core specimen decreases as the core diameter reduces. Such a relation is associated with the internal

Learn More### The 28-Day Myth - National Precast Concrete Association

Oct 28, · I am looking for a model or set of models and equations that will allow me and my company to make a general prediction of the 28-day break strength of concrete, given the weight, volume and density of cementitious materials, aggregates, air-entrainer, water reducer, other various admixtures, w/c ratio, slump, aggregate size, volume of air, etc.

Learn More### Mix Design of High Strength Concrete -Procedure

Design a high strength concrete for use in the production of precast prestressed concrete to suit the following requirements: Specified 28-day works cube strength = 50 MPa Very good degree of control; control factor = 0.80 Degree of workability = very low

Learn More### Nondestructive Concrete Strength Estimation based on

The trained ANN was verified with conventional strength estimation models throughout a series of experimental studies. According to the comparison results, it is noted that the proposed technique could be very effectively applied to estimate the strength of concrete.

Learn More### SHRINKAGE IN REINFORCED CONCRETE STRUCTURES: A

V. Gribniak et al. Shrinkage in reinforced concrete structures: a computational aspect 50 This is only 10 to 20 % of the long-term shrinkage (Sil-liman & Newtson 2006). Consequently, autogenous shrinkage was neglected for many years. On the other hand, in the case of high-strength concrete

Learn More### Simpson Strong-Tie AT-XP High-Strength Acrylic Adhesive

Strength Reduction Factor — Steel Failure φ — 0.756 c Effectiveness Factor — Uncracked Concrete kuncr — 24 Effectiveness Factor — Cracked Concrete kcr 17 Strength Reduction Factor — Breakout Failure φ — 0.658 c Uncracked Concrete 2,3,4 Characteristic Bond Strength τ k,uncr psi 1,010 990 970 955 935 915 875 Permitted Embedment

Learn More### Evaluation of Early-Age Concrete Compressive Strength with

removal concrete strength of 5 MPa. The Manual of Concrete Practice [4] speciﬁes a value of 8 MPa for high-strength concrete with a design strength of 40 MPa or more. On the other hand, ACI 318-14 [5], ACI 347-14 [6], and EM 1110-1- [7] all state that the designer should directly decide the removal

Learn More### Prediction of Concrete Properties Using Multiple Linear

Here, data from various concrete mixing plants and ongoing construction sites was collected for M20, M25, M30, M35, M40, M45, M50, M55, M60 and M70 grade of concrete. Multiple Linear Regression (MLR) and Artificial Neural Network (ANN) models were built to predict slump as well as 7-days and 28-days compressive strength.

Learn More### Estimating Compressive Strength of High Performance

Furthermore, GPR model is strongly recommended for estimating HPC strength because this method demonstrates good learning Nhat-Duc Hoang, Anh-Duc Pham, Quoc-Lam Nguyen, Quang-Nhat Pham, "Estimating Compressive Strength of High Performance

Learn More### Deformation Capacity and Strength of RC Frame Members

The term “high-strength” typically refers to concrete with a compressive strength greater than 8 ksi (55 MPa) and steel reinforcement with a yield strength greater than 80 ksi (550 MPa). Advantages of using these high-strength materials include smaller member sizes and reduced reinforcement congestion. High-strength concrete is already

Learn More### Multiple Regression Model for Compressive Strength

A mathematical model for the prediction of compressive strength of high performance concrete was performed using statistical analysis for the concrete data obtained from experimental work done in this study. The multiple non-linear regression model yielded excellent correlation coefficient for the prediction of compressive strength at different ages (3, 7, 14, 28 and 91 days).

Learn More### Concrete Compressive Strength Data Set

Concrete compressive strength -- quantitative -- MPa -- Output Variable Relevant Papers: Main 1. I-Cheng Yeh, "Modeling of strength of high performance concrete using artificial neural networks," Cement and Concrete Research, Vol. 28, No. 12, pp. 1797-1808 (1998). Others 2.

Learn More### Tensile Strength Of Concrete Test - Procedure [Civil Planets

So mostly, the tensile strength of concrete tests are not required to perform at the site. The framed structure built up by the combination of brittle and ductile material. The concrete's ability to withstand pull force (Tensile Stress) without breaking is called the Tensile Strength of concrete.

Learn More### Evaluation of Ultimate Bearing Capacity of Pre-Stressed

Abstract: Estimation of ultimate bearing capacity (UBC) of pre-stressed high-strength concrete (PHC) pipe pile is critical for optimizing pile design and construction. In this study, a standard penetration test (SPT), static cone penetration test (CPT) and static load test (SLT) were carried out to assess,

Learn More### Estimation of Coarse Aggregate Strength in High-Strength

This study presents a formula to directly estimate the compressive strength of a coarse aggregate particle to be used in high-strength concrete. Since the underlying idea of the strength estimation is derived from the theory of granular mechanics, the formula is expressed by means of concepts of the volume average of stress over a single

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