abstract statement of problem: the ph of the human abscess has been measured as low as 5.0. this low ph could potentially inhibit setting reactions, affect adhesion, or increase the solubility of root end filling materials hence affect the compressive strength. moreover, root end filling materials might expose or even mix with lidocaine hcl during periapical surgery. objectives: the aim of this...

Freeze–thaw cycles under the conditions of snowmelt and rainfall infiltration in winter are triggers for petroglyph weathering. Rock samples from Helan Mountains were subjected freeze–thaw various laboratory testing, mass, elastic wave velocity unconfined compressive strength tested. The results show that mass loss rate, decreased. In addition, according to XRD analyses, content calcite feldspa...

Lightweight yet stiff and strong lattice structures are attractive for various engineering applications, such as cores of sandwich shells and components designed for impact mitigation. Recent breakthroughs in manufacturing enable efficient fabrication of hierarchically architected microlattices, with dimensional control spanning seven orders of magnitude in length scale. These materials have th...

Abstract Sustainable infrastructure is one of the sustainable development goals (SDGs) introduced by United Nation. By utilizing waste materials as recycled and reused in construction, it offers great benefits to people, economy environment for geotechnical project development. The low strength marine subgrade pavement soil can be improved chemical stabilization from abundant natural near coast...

Peat normally has high organic matter content and is generally associated with high compressibility and high magnitude and rates of creep. It may also be associated with poor strength characteristics and a risk of large deformation. The main specifications in the peat nature are the presence of acidic or less commonly alkaline media, combined with a high level of ground water. One of the most c...

AIMS To examine organic neem compounds for their effective growth inhibition of saprotrophic soft-rot fungi on anthracite bricks bound with collagen and lignin for use in iron foundry cupolas as an alternative fuel source. METHODS AND RESULTS Azadirachtin, crude neem oil (NO), and clarified neem oil extract (CNO) were combined with copper to inhibit the growth of the soft-rot fungus, Chaetomi...

Abstract As more engineering projects and activities are taking place on around weak rocks, it is becoming important to study characterize them. Since regular practices of rock mechanical testing not effective for special laboratory tests measurements were performed the Alkharj Saudi sandstone which a clastic dominantly sandy limestone sandstone. Test results presented in this paper. Porosity, ...