The use of Wire Mesh-Polyurethane Cement (WM-PUC) composite to strengthen RC T-beams under flexure

Zhang, Kexin; Sun, Quansheng

doi:10.1016/j.jobe.2017.11.008

Cited by 38 publications

(16 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main components of PUC are polyurethane and cement, mixed together [3][4][5][6]. The hardness range of this material is 10-100 (IRHD), and it possesses good chemical resistance, flexibility, adhesion and film-forming properties.…”

Section: Experimental Program and Testing Methodsmentioning

confidence: 99%

“…The availability of many tests and the number of projects demonstrate that the use of polyurethane cement (PUC) materials to strengthen bridge structures is becoming a feasible technique [1][2][3][4][5][6]. PUC material can make the repair or retro-fitting of bridge elements more effective, easier to handle, and cheaper because of its very simple method of implementation and its excellent properties and flexural behaviour [1].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Zhang¹,

Sun²

2019

CEJ

Self Cite

View full text Add to dashboard Cite

In order to study the fatigue properties of polyurethane cement (PUC), the newly bridge reinforcement material, three different densities of PUC beams were tested. The studies indicate that the fatigue life of PUC material obeys two parameters Weibull distribution, and the double logarithm fatigue equation with different failure probability is established by this mathematical model. The fatigue life equations of the PUC with three different densities (PUC1500, PUC1200 and PUC800) were established when the failure rate was 0.5. The fatigue life of PUC1500 is the largest, and the fatigue life of PUC material decreases with the decrease of its density. Under the action of bending fatigue load, the fatigue strain of PUC material can be divided into three phases.

show abstract

Section: Experimental Program and Testing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Zhang¹,

Sun²

2019

CEJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…To fully utilize the area of beam substrate, the strengthening layer has the same width as the beam. A typical thickness for FRCM system of 20 mm is adopted for the strengthening layer [32]. To provide sufficient anchorage, the strengthening layer is extended close to the beam ends, with a total length of 1,700 mm.…”

Section: Strengthening Schemementioning

confidence: 99%

Flexural strengthening of reinforced concrete beams using fabric reinforced Alkali-Activated Slag matrix

Shen

Chen

et al. 2021

Journal of Building Engineering

View full text Add to dashboard Cite

Old Reinforced Concrete (RC) buildings are facing different degrees of structural deterioration and require proper strengthening to enhance their structural performance as well as to extend their life span. Fabric reinforced Alkali-Activated Slag (AAS) matrix is proposed to strengthen RC beams in this study. Seven RC beams with and without strengthening were prepared and tested under four-point bending. Test results indicate that use of AAS matrix as replacement for conventional cement-based matrix can change the failure mode of the strengthened beams from end-debonding of strengthening layer to slippage combined with rupture of fabric. The AAS-based strengthening strategy is able to enhance the loading capacity and flexural stiffness of RC beams as well as to reduce the strain of tensile reinforcements. Except the specimens failed in the premature debonding, increasing the fabric amount in the strengthening scheme improves the loading capacity of beams. In an optimal case, the yielding and ultimate loads of the strengthened beams are enhanced by 22.2% and 26.4%, respectively. Moreover, an analytical model was developed to predict the characteristic loads of the fabric reinforced AAS matrix strengthened beams. It shows that the analytical model could overestimate the yielding and ultimate loads of the strengthened beams, probably due to slippage and reduced synergistic effect of fabric bundles in the strengthening system. Based on that, two efficiency factors of 0.35 and 0.25, taking account of the area of effective fabric, are obtained and recommended to estimate the yielding and ultimate loads of fabric reinforced AAS matrix-strengthened beams, respectively.

show abstract

“…Their resistance to fire is excellent, but the opposite is true for tensile strength, which is considered very small and, in most cases, neglected. Thus, steel reinforcements are used in concrete structures to impart solid bending and tensile force resistance and to protect buildings from seismic activity (Zhang and Sun 2018). For compression strength, concrete is excellent because of the aggregates it contains (Kosmatka et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of pre-treatments and additives on the improvement of cement wood composite: A review

Brahmia

Horváth

Alpár

2020

BioRes

View full text Add to dashboard Cite

Cement wood composites (CWC) are a popular construction material. Lightweight or panel-wise wood-based buildings have a growing market in central Europe. Requirements and regulations on both the global and national level are forcing continuous developments. This paper summarizes the research achievements in improving the hygroscopic and mechanical properties and shortening the manufacturing time of CWC via pre-treatments and additives. In addition, new perspectives on enhancing its fire resistance properties by using fire retardant pre-treatments are discussed. CWC without any pre-treatment is a material within the B-s1, d0 category of fire resistance. Using fire retardants could upgrade it to the category A1 but the fire retardants should not affect the primary properties of CWC. There are a number of potential fire retardants of wood that may be used, such as phosphorus, boron, and magnesium compounds.

show abstract

The use of Wire Mesh-Polyurethane Cement (WM-PUC) composite to strengthen RC T-beams under flexure

Cited by 38 publications

References 14 publications

Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Flexural strengthening of reinforced concrete beams using fabric reinforced Alkali-Activated Slag matrix

Effect of pre-treatments and additives on the improvement of cement wood composite: A review

Contact Info

Product

Resources

About