Predicting Concrete Compressive Strength and Modulus of Rupture Using Different NDT Techniques

Abstract

Quality tests applied to hydraulic concrete such as compressive, tension, and bending strength are used to guarantee proper characteristics of materials. All these assessments are performed by destructive tests (DTs). The trend is to carry out quality analysis using nondestructive tests (NDTs) as has been widely used for decades. This paper proposes a framework for predicting concrete compressive strength and modulus of rupture by combining data from four NDTs: electrical resistivity, ultrasonic pulse velocity, resonant frequency, and hammer test rebound with DTs data. The model, determined from the multiple linear regression technique, produces accurate indicators predictions and categorizes the importance of each NDT estimate. However, the model is identified from all the possible linear combinations of the available NDT, and it was selected using a cross-validation technique. Furthermore, the generality of the model was assessed by comparing results from additional specimens fabricated afterwards.

Microwave Non-Destructive Inspection and Prediction of Modulus of Rupture and Modulus of Elasticity of Engineered Cementitious Composites (ECCs) Using Dual-Frequency Correlation

“…Moreover, it has been clearly observed that there is a trend of increasing values of MOE with decreasing w / b ratio. The growth of MOE can be explained based on Power’s Model [ 45 ], as the hydration degree increases and the hydration products grow, the volume of water reduces. As a result, the MOE increases with the curing age.…”

“…Due to the increase demand of using ECC in composite structures it becomes very important to study different methods of NDT that can be used for structural health monitoring [ 45 ]. MOE and MOR are the two impotant mechanical properities that affect the structural behaviour of not just CBMs [ 46 , 47 , 48 ], but also common structural materials like flakeboard [ 49 ] and woods [ 50 ].…”

Performance of Mortars Made Using Ternary Binders with Addition of Slag, Fly Ash and Limestone Exposed to a Real Environmental Condition Compatible with Exposure Class XC3

“…This saturation degree changes when a drying of the material is produced, for example under non-optimum RH environments. Several works have concluded that the electrical resistivity considerably increases as the saturation degree of the material decreases [78,79]. In the analyzed environment, the average RH was around 65% (see Section 2.2), so it would produce a progressive drying of the samples, which could explain the gradual rise with time of electrical resistivity noted for the mortars.…”

Effects of a Real Exposure Class XC4 Mediterranean Climate Environment in the Behavior of Mortars Made Using Ternary Binders with Addition of Slag, Fly Ash and Limestone

“…The electrical resistivity allows obtaining information regarding the changes in the pore structure of cement-based materials, although it is greatly influenced by the drying process, which would modify the saturation degree of the material [ 53 , 72 ]. This drying produces a lessening of the volume of electrolyte, which fills the pore structure of the material, giving, as a result, an increase in the electrical resistivity [ 72 , 73 , 74 ]. The reduction in porosity and the greater presence of pores with finer sizes would also lead to a reduction in the amount of electrolyte present in the material, also producing a rise of the resistivity [ 75 , 76 , 77 ].…”