Influence of Water Binder Ratio and Chemical Admixture on the Properties of Self- Compacting Concrete with composite Cement- Fly Ash binder

This paper describes an experimental investigation to study the combined effect of water binder ratio and chemical admixture on mechanical properties of self- compacting concrete (SCC) prepared using composite fly ash–cement binder. For this purpose, the mixture proportioning for SCC was based upon creating a high-degree of flowability by using High-Range Water-Reducing Admixtures (HRWRA) combined with Viscosity Modifying Admixture (VMA) to ensure homogeneity of the mixture. The flowability test results showed that the spread for all mixes was within the specified range recommended by EFNARC 2005 and EN 206. The J Ring height for all SCC mixes was observed to be between 17-20 mm, which was within the specified limits of EFNARC 2005. A visual stability index has been provided to all SCC mixes for qualitative assessment of the flowability indexes. The cementing efficiency factor of fly ash, adopted in the presented work, restores the cementitious content in the mix. At 0.36 w/b ratio, the cube compressive strength at 28 days was almost 51MPa when 2.2% HRWRA with VMA was added to the mix. Through the different flowability test results, an effort has been made to develop a correlation between different flowability parameters using regression analysis in MINITAB software. An empirical formula in the form of basic equations suggested by CEB-FIP and ACI 363R -92 to express the relationship between split tensile strength and compressive strength of SCC has also been proposed

Effect of Fly Ash on Mortar Mixes with Quarry Dust as Fine Aggregate

This paper presents the results of an experimental investigation carried out to evaluate the compressive strength and transverse strength of 1 : 3 mortar mixes in which natural sand was replaced with 20%, 50%, and 100% quarry dust by weight which were further modified by partially replacing cement with four percentages (15%, 20%, 25%, and 30%) of low calcium fly ash. The compressive strength was determined at 3, 7, 28, and 50 days of age while transverse strength was determined at 28 and 50 days age. Test results revealed that the combined use of quarry rock dust and fly ash exhibited excellent performance due to efficient microfilling ability and pozzolanic activity

Fibular collateral ligament reconstruction of knee using titanium button: a new fixation technique and an outcome of 35 cases

Background: The fibular collateral ligament (FCL) is an important stabilizer of the lateral side of the knee through the whole range of motion. Likewise, it resists external rotation near full extension. Many techniques has been described in the literature for fixation of graft to the fibula like interference screws, making loop around the fibula head but nothing has been said about Titanium button fixation at Fibula end. In our series graft has been fixed at Fibula end using Titanium button. In this article we described our new graft fixation technique.Methods: We included 35 patients all were solider of Indian army and navy who got their knee injured during duties, sport, training and accident, were operated with new technique of graft fixation at Fibula end.Results: As far as my search in the present literature while writing our present study the graft fixation at Fibular end using Titanium button has not yet described by any author. This fixation is robust and results were promising. Out of 35 cases only 02 patients developed knee stiffness and none were has lateral knee opening (Varus stress test was negative). All patients were available for follow up for 18 months.Conclusions: Based on our new technique of the graft fixation at Fibular end using Titanium button we can conclude that this technique is simple and fixation is robust with promising results

Vascular Injury in Total Hip Replacement: Management and Prevention

This chapter analyzed the vascular complications in total hip replacement. Vascular injuries are the uncommon but well recognized and serious issue. During total hip replacement, laceration of major blood vessels has been reported which even cause morbidity and mortality. The injury to vascular structures occurs due to the placement of screws to fix acetabular components, structural grafts, and protrusio cages or rings. Massive hemorrhage resulting in immediate exsanguination may be caused due to the damage of any of these vessels by processes such as drilling, reaming, retraction, or dissection. The majority of these vascular injuries might be better prevented or even more proficiently treated by comprehensive preoperative assessment, better instrumentation, and careful postoperative monitoring

ANTIULCER ACTIVITY OF THE MOST ACTIVE SUB-FRACTION OF METHANOLIC LEAF EXTRACT OF BUCHANANIA LANZAN SPRENG

Objective: To evaluate the antiulcer activity of the most active sub-fraction of Buchanania lanzan Spreng. leaves methanolic extract (BLE).Methods: The antioxidant activity of BLE fractions and sub-fractions has been assayed to determine the most active sub-fraction by using in vitro antioxidant methods like hydrogen peroxide free radical scavenging assay, hydroxyl radical scavenging assay, DPPH (1, 1-diphenyl-2-picryl hydrazyl) radical scavenging activity, total flavonoid and total phenolic content estimation. Then, the antiulcerogenic activity of most active sub-fraction of BLE (50 and 100 mg/kg, b.w., orally) was evaluated employing aspirin+pylorus ligation-induced (APL) and HCl/ethanol-induced (HE) gastric ulcer models in rats, and histopathological examination of stomach tissues of rats.Results: The most active sub-fraction of BLE exerted a significant (P<0.01) dose-dependent decrease in the ulcerative lesion index produced by APL and HE ulcer models in rats as compared to the standard drugs omeprazole (30 mg/kg, b.w. orally) and ranitidine (32 mg/kg, b.w. orally) respectively. The reduction in gastric fluid volume, total acidity and an increase in the pH of the gastric fluid in APL treated rats proved the antisecretory activity of most active subfraction of BLE. From histopathological examination, it was found that in tissues of both the models that received pretreatment with most activesub-fraction showed better protection of the gastric mucosa in a dose-dependent manner as indicated by reduction or absence of mucosal erosion and infiltration of leucocytes.Conclusion: These results suggest that leaves of Buchanania lanzan Spreng. possess potential antiulcer activity, which may be attributed to its antioxidant mechanism of action

Infected gap nonunion of fractures proximal humerus in adolescent: an outcome of 12 cases

Background: There is little data about the risk factors, demographics, and prognosis for nonunions in children. Previous literature has reviewed time periods when contemporary techniques of internal fixation and management of open injuries had not been available. Infected gap nonunion of proximal 1/3 humerus in adolescent is not much reported the in literature. The purpose of our study was to evaluate the outcome of infected gap nonunion in 12 cases of adolescent treated by debridement and fibular graft and plating.Methods: This study was conducted between 2009 to 2015, 12 cases of Infected gap nonunion of fractures proximal humerus was included in our study. Each child was followed up minimum for 12 months.  Although non unions in the pediatric population are rare, these data underscore the importance of careful evaluation and treatment of these fractures at risk for nonunion.Results: In our series of 12 cases of infected nonunion of fracture humerus which were treated by bone grafting using fibula strut graft and plating resulted 99% union rate. The rate of union is depending on thorough debridement and fixation along with bone grafting.Conclusions: Nonunion of pediatric fractures is a rare complication. Most studies on developing pediatric nonunions describe specific fractures that are particularly susceptible to nonunion and malunion, nonunion of humeral lateral condyle and open tibia fractures have received the most attention. Reports of nonunion among pediatric long bone fractures are rare, being either case reports or isolated entities in a larger series of predominantly adult fractures. Fibula is a popular substitute for this method because of its easy accessibility and minimal donor site morbidity

A two stage non extraction treatment of class II division 1 malocclusion using split-activator and fixed appliance – A case report

AbstractClass II malocclusions are one of the most common problems in orthodontic treatment. There are a variety of effective and simple treatments to correct them, such as headgear and functional appliances. Functional appliances are commonly used for the treatment of class II malocclusions with mandibular deficiency. The success of treatment with a functional appliance relies on the patient’s cooperation and favourable mandibular growth. Treatment with a functional appliance usually lasts for 9–12months and requires a proper retention time to ensure complete musculoskeletal adaptation.A second stage of treatment with a full-fixed appliance is often required to achieve proper alignment and good interdigitation of the dentition. In the present case, a prepubertal twelve year female with a class II malocclusion and retrusive mandible was treated first with an activator for 17months. The activator successfully resolved the problem of the retrusive mandible with favourable mandibular growth. This was followed by 10months of fixed orthodontic treatment to finalize the occlusion without extractions. This two phase treatment yielded a pleasing profile and good occlusion in this patient

Effect of Quarry Waste on Self-Compacting Concrete Containing Binary Cementitious Blends of Fly Ash and Cement

This paper presents the results of the experimental work conducted to study the effect of quarry waste on self-compacting concrete containing binary cementitious blends of fly ash and cement. For this purpose nine trial mixes were prepared, where the percentage replacement of river sand by quarry waste was 0%, 10%, 20%, 30%, 40%, 50%, 70%, and 100% to study the flowability characteristics of SCC. In all, 108 cube samples and 54 cylindrical samples were cast to study the strength parameters of SCC with and without quarry waste. The water to binder ratio was maintained at 0.36% while the dose of chemical admixture was 2.2% by weight of cement. For all trial mixes the fly ash percentage replacement to cement was kept constant at 30%. Based on the standard flowability test a visual stability index has been provided to all the trial mixes. Quarry waste replacement showed the desirable results that can suggest the usage in self-compacting concrete as well as in normally vibrated concrete

Prevalence of depression and health related quality of life among patients with diabetes mellitus and hypertension attending a secondary care hospital in district Faridabad, Haryana

Background:  Diabetes mellitus (DM) and hypertension (HT) have significant effect on the mental health of the patient. and. We aimed to estimate the prevalence of depression, and the quality of life among patients with diabetes mellitus and hypertension who attended a secondary care hospital. Methods: A cross-sectional study was carried out among 618 patients who had DM and/or HT.  PHQ-9 and WHO-BREF QOL questionnaire were administered to assess depression and health related quality of life respectively. Results: More than 2/3rd of patients had depression. Among those who had depression, nearly half (46%) had moderate depression and 2.1% had severe depression. The proportion of severely depressed patients was higher in diabetes mellitus group compared to the hypertension group.   Patients that were depressed had poorer quality of life compared to non-depressed, and the difference was statistically significant. Conclusion: Patients with diabetes mellitus and hypertension may be screened for depression and managed accordingly