Experimental and Predictive Mechanical Strength of Fiber Reinforced Cementitious Matrix (Frcm)

ABSTRACT:This study is about the use of fiber reinforced mortar (FRM) as a jacketing material for reinforced concrete (RC) columns. Presented in this paper are analyses of the test results of destructiveloading that were conducted to explore the applicability of different jacketing materials as retrofit to RC columns. The jackets used to wrap RC columns were built of mortar mixed with different fibers. The fibers considered were steel fibers and polymer fibers. A simple model based on material properties was used to simulate the axial strength of the columns. The numerical model calculation results as well as the experimental test results were used to assess the performance of the jacketing materials used. The experimental part consisted of testing two sets of column specimens. The first set is wrapped with mortar jackets reinforced with steel fibers and the second set is wrapped with mortar jackets reinforced with polymer fibers with and without fly ash. The efficacy of the different FRM jackets as retrofitting materials was assessed by calculating the effect of confinement. The calculation was accomplished by measuring the maximum load of the retrofitted columns with jackets and then subtracting the load that can be carried by the control specimens, that is, the column with the original cross section. The confining effect was used as the basis in determining the confined compressive strength of concrete and then used to establish a model that can simulate the axial strength of the columns. The results indicate that the FRM jackets are effective as retrofitting material for RC column.

Section: Introductionsupporting

confidence: 88%

“…(Refer to Table 1). Sakthivel et al [4] investigated concrete with almost the same steel fiber volume range. Fig.3 Typical cross-section of column specimen with PFRM jacket Shown in Table 1 are the construction details of the RC column specimens.…”

Section: Experimental Programmentioning

confidence: 99%

Evaluation of Different Fiber Reinforced Mortar as Retrofitting Materials for Rc Columns

Lejano¹

2017

“…The woven fabric texture achieved the highest tensile strength, with the surface properties of the resulting composite material providing resistance in two dimensions [10]. Composite material stress was also highly dependent on the texture of the introduced fibers ( Figure 3) [11].…”

Section: Determination Of Flexural Strength and Tensile Strengthmentioning

confidence: 99%

Development and Characterization of a Composite Material Reinforced by Plastic Waste: Application in the Construction Sector

Halimi¹

2017

Waste reuse is subject to an increasing amount of research aimed at reducing the negative impact of such material on the environment. This study explores the possibility of using plastic waste as reinforcement in composite materials. A family of materials was developed using an unsaturated polyester resin (UPR) organic matrix and various mineral fillers (marble powder, expanded perlite, sand, etc.), potentially allowing their use in wall and floor coverings and as raw materials in the manufacture of traditional ceramic tables. Selected mechanical properties of these materials were verified, including flexural strength, tensile strength, and density. The results demonstrate the role of reinforcement in oriented fibers or matt fabric in improving the mechanical properties of the materials. Flexural strength is improved via reinforcement in the form of random or woven plastic fibers (32.44 MPa). However, the use of expanded perlite as a filler results in a lower mechanical strength (31.16 MPa) than marble powder or sand because of its friability.

“…Elevado et al [20] developed predictive models for the compressive strength of concrete with cement substitution with fly ash and partial substitution of coarse aggregates with ceramic tiles using ANN. Sakthivel et al [21] developed a predictive model for the mechanical strength of fiber reinforced mortars using statistical regression analysis. Richard et al [22] proposed a model for prediction of carbonation depth of reinforced concrete structures using ANN.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Strength of Cement Mortars Containing Natural Pozzolan and Silica Fume Using Multivariate Regression Analysis

Dahish¹,

Bakri²,

Alfawzan³

2021

In this study, mortars containing locally available natural pozzolan (NP) in Almadinah Almunawara, Kingdom of Saudi Arabia, were investigated as a partial substitute for sand or cement in mortars and silica fume (SF). The benefit of using local NP powder as a replacement for cement is that it reduces the carbon dioxide emission during the cement manufacturing process, whereas the benefit of using local NP as fine aggregates is that it reduces the density of the produced mortars and improves its properties because of its pozzolanic effect. Because of these reasons, there is a need to develop an effective predictive model to estimate the compressive strength of mortars with partial replacement of cement or sand with NP and with SF as a replacement for cement at 28 days. Data of 68 cubic specimens of 50 mm were established through experimental work with other researchers, and they were chosen to create a database for the proposed model. There were three input parameters: a) level of partial substitution of cement with NP powder, b) level of partial substitution of sand with NP, and c) level of partial substitution of cement with SF. The output parameter was compressive strength. Best correlations were obtained between the compressive strength and sand replacement with NP. To predict the compressive strengths of cement mortars containing NP and SF, multivariate regression models were proposed and compared to find the best one. It was concluded that the full quadratic model was the best model with highest correlation when compared with other proposed models.