Most of the construction materials research now concerns on investigation of construction materials that is locally produced at a rate and cost compatible with the pace of construction. The present paper is concerned with investigation of fresh and hardened properties of self-compacting concrete (SCC) produced from local available materials in JORDAN. The produced SCC contains the local stone cut waste powder which is called Al-KHAMKHA in JORDAN with different replacement of (0%, 10%, and 25%) of fine silica aggregate; the study also investigates the effects of SP33 super plasticizer which is used by different doses (1%, 1.5% and 2%) for cement. The slump flow and the compressive strength of SCC were studied and the experimental results indicate the possibility of using Al-KHAMKHA in the production of SCC as the results showed that the compressive strength of the SCC with 10 % replacement by al-khamkha together with 1% SP33 super plasticizer was higher compared to pure SCC without al-khamkha; the results also showed that as al-khamkha content increased the slump flow decreased.

The structure could be impacted by concrete's steel reinforcement corroding. When exceptional corrosion resistance capabilities are required, fiber-reinforced polymer (FRP) reinforcements offer a practical choice for constructions exposed to hostile environments. However, only a small number of the building's most important structural components are currently permitted to use FRP bars as interior concrete reinforcement, leaving the rest of the building unprotected. This is due to the lack of available curved or shaped reinforcing FRP pieces, which have subpar structural performance. Eighteen concrete beams with dimensions (1200×225×150) mm were divided into three groups and each group had five beams with three References and five different types of stirrups in each group and tested them up to failure. The first group included longitudinal reinforcing steel bars 6Ø10mm, the second group longitudinal reinforcing GFRP bars 6Ø10mm, and the third group longitudinal reinforced with hybrid (3steel+ 3GFRP) bars 6Ø10mm. All beams are self-compacting concrete with a longitudinal hollow with dimensions (50×100) mm. The results showed that the ultimate load of a hollow beam reinforced with steel reinforcement is less than a solid beam reinforced with steel (reference 1) by (15%) and a hollow beam reinforcing with GFRP reinforcement is less than a solid beam reinforced with GFRP (reference 2) by (5%), and a hollow beam hybrid reinforced with (Steel+ GFRP) reinforcement is less than a solid beam reinforced with GFRP (reference 3) by (4%).

No abstract

One of this theoretical study, parameters that affecting the ultimate load capacity of the axially loaded column are studied. The parameters such as compressive strength of concrete and steel reinforcement ratio.  Throughout study a different value of each factor will be assumed. Then the nominal load-carrying capacity of axially loaded column was calculated for these different factors parameters according using the simplified methods provided in (ACI-318- 14) building code requirement for structural concrete and Prokon Program. It is observed that increasing the compressive strength of concrete result in improving the ultimate load capacity. Using compressive strength of concrete more than 40MPa which results in increasing of (Pu) from (2362kN) to(5918KN) . On other hand The total area of longitudinal reinforcement bars (AST), and the gross area of concrete section (Ag) have a significant effects also on increasing of (Pu) value but not as (Fcʹ).  

Background/Aim: There is a global increase in life-style related risk factors for CVD. However, few studies have examined the prevalence of these factors in the general population at different social settings/gathering such as night clubs, drinking points/bars and discotheques where different lifestyle habits are freely displayed. Identifying such factors can lead to innovative strategies for improving cardiovascular health. The aim of this study was to determine the prevalence of lifestyle, clinical and biochemical risk factors for CVD among night clubbers in Southern Nigeria.Methods: Anthropometrics, questionnaires, clinical and blood samples were collected from 255 participants who were classified as night clubbers (n=130) and non-night clubbers (n=125) and analyzed for body mass index (BMI), waist circumference (WC), socio-demographics, life style related behaviors, blood pressure indices, lipid profile and markers of insulin resistance using standard methods. Results: Compared to non-clubbers, night clubbers had significant higher prevalence of CVD risk factors including habitual alcohol consumption (P<0.001), physical inactivity (P=0.026), poor dietary habits (P<0.001), short sleep duration (P<0.001), abnormal lipid sub fractions (high serum TG, T-chol and LDL levels) (P<0.001), raised blood pressure indices (SBP, DBP, MAP) (P<0.0001), raised serum uric acid level (P<0.0001) and a marker of insulin resistance (HOMA-IR) (P=0.060). Conclusion: CVD risk factors are more prevalent among night clubbers than non-clubbers. Night club, discotheque, tavern, drinking point and bar patrons should be included among target populations in development of interventions necessary to reduce the high prevalence of CVD risk factors in the general population, because current risk factors become future diseases and public health burden. Knowledge of risk factors can be used to shift their population distribution.