Posted by: poolmand - 12-01-2021, 07:01 AM - Forum: ACI
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ACI 310.1-20: Specification for Polished Concrete Slab Finishes
| Size: 3.2 MB| Format:PDF| Quality:Original preprint| Publisher: American Concrete Institute| Year: December 16, 2020 | ISBN: 1641951273
This is a Reference Specification that the Architect/Engineer can apply to any construction project involving polished concrete slab finishes by citing it in the Project Specifications. A mandatory requirements checklist and an optional requirements checklist are provided to assist the Architect/Engineer in supplementing the provisions of this Specification as required or needed by designating or specifying individual project requirements. The first section of this Specification covers general requirements for polished concrete slab finishes. The second section covers requirements for products and equipment, and the third section covers construction requirements. Provisions governing testing, evaluation, and acceptance of polished concrete slab finishes are included. This Specification for polished concrete slab finishes is applicable to both slabs-on-ground and suspended slabs.
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This document presents recommended methods and procedures for measuring, mixing, transporting, and placing heavyweight concretes that are used principally for radiation shielding in nuclear construction. Also covered are recommendations on cement, heavyweight aggregates, water, and admixtures. Mixture proportioning of heavyweight concrete is discussed. Mixing equipment, form construction, placing procedures, and methods of consolidation are described. Quality control, inspection, and testing are emphasized, and a list of references is included. Preplaced heavyweight concrete is not discussed in this version of 304.3R. It is covered in the 2004 version of the document.
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This Specification covers minimum requirements for the construction of pervious concrete pavement. This Specification covers materials, preparation, forming, lacing, finishing, jointing, curing, and quality control of pervious concrete pavement. Provisions governing testing, evaluation, and acceptance of pervious concrete pavement are included.
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ABAQUS software is a general-purpose finite element simulation package mainly used for numerically solving a wide variety of design engineering problems; however, its application to simulate the dynamic structures within the civil engineering domain is highly complicated. Therefore, this book aims to present specific complicated and puzzling challenges encountered in the application of Finite Element Method (FEM) for solving the problems related to Structural Dynamics using ABAQUS software that can fully utilize this method in complex simulation and analysis. Various chapters of this book demonstrate the process for the modeling and analysis of impenetrable problems through simplified step-by-step illustration by presenting screenshots from ABAQUS software in each part/step and showing various graphs.
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Bentley RAM Elements CONNECT Edition V16 Update 5 v16.05.00.213 x64
Size: 1.28 GB
Tackle projects with confidence and efficiently produce high quality and economical designs, using various concrete, steel, and joist building materials; all in compliance with your local building codes. Quickly design, analyze, and create documentation for your building projects, saving time and money. Design anything from individual components to large-scale building and foundations. Increase your productivity by eliminating tedious and time consuming tasks with RAM’s practical applications. RAM maximizes your software investment with one fully integrated application suite offering complete building analysis, design, and drafting for both steel and concrete structures. Easily share your structural data with applications such as Revit, Tekla, and Bentley’s AECOsim Building Designer through Integrated Structural Modeling (ISM) workflows.
Capabilities
- Analyze gravity and lateral load
Design and analyze simple or complex structures for a wide range of loading conditions, including those induced by gravity such as dead and live loads, including skip conditions, in combination with lateral loads including wind and seismic.
- Comply with seismic requirements
Design and detail seismic force-resisting systems, generating seismic loads according to the relevant building code. Consider these forces in the design of elements and, where applicable, the design of frames and the larger structural system. Enforce the ductility requirements of the selected design code in element proportioning and detailing.
- Design and analyze with finite elements
Complete building analysis, design, and drafting for the entire structure accurately and efficiently using our state-of-the-art finite element analysis. Reduce or eliminate the time spent waiting for results using our fast solvers.
- Design and analyze structural models
Quickly model your entire structure, including decks, slabs, slab edges and openings, beams, columns, walls, braces, spread and continuous footings, and pile caps. Efficiently automate many of your time-consuming design and analysis tasks and produce practical system and component designs that are document ready.
- Design to international design standards
Extend the reach of your business practice and take advantage of global design opportunities by using a wide range of international standards and specifications in our design products. Complete your designs with confidence thanks to extensive support of U.S. and international standards.
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This report presents recommendations for structural design, materials, and construction of structures commonly used for hazardous materials containment, including reinforced concrete tanks, sumps, and other structures that require dense, impermeable concrete with high resistance to chemical attack. The report discusses and describes design and spacing of joints, proportioning of concrete, placement, curing, and protection against chemicals. Information on liners, secondary containment systems, and leak-detection systems is also included.
Keywords:
chemical protection; liners; construction joint; containment systems; gas-tight; hazardous materials; joint sealant; liquid-tight; precast concrete; prestress; water-cementitious materials ratio; waterstop.
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This Specification gives requirements for repairing cracks in concrete by injection of two-component epoxy-resin adhesive.
Keywords:
adhesive; crack; epoxy; repair injection; sealer
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Author(s)/Editor(s): Katarzyna Zdanowicz | Size: 20.41 MB| Format:PDF| Quality:Original preprint| Publisher: Gottfried Wilhelm Leibniz Universität Hannover| Year: 2021| pages: 169
Prestressing of concrete with non-metallic reinforcement is an emerging field in structural engineering, as it can significantly contribute to better exploitation of the mechanical properties of such reinforcement and behaviour of concrete structures. Non-metallic reinforcement includes fibre reinforced polymer rebars and tendons, as well as various types of textile reinforcement. Textile reinforcement is particularly challenging as a material used for prestressing because of its geometrical form and structure. Therefore a technology of chemical prestressing, where expansive cement is used to induce stresses instead of mechanical devices, comes as an alternative yet promising method for such types of reinforcement. The thesis aim was to experimentally assess the behaviour of expansive concrete members with carbon textile reinforcement. Three objectives were undertaken: 1) to prove whether chemical prestressing of concrete elements with textile reinforcement is possible, 2) to quantify the introduced prestressing forces and the influence of prestressing on serviceability limit state with a focus on cracking load, 3) to analyse the influence of chemical prestressing on aspects relevant for the design of structural members and on their performance. A feasibility study was performed to investigate the possibility of prestressing with expansive cement. Expansive strains were measured with standardized methods, as well as with distributed fibre optic sensors in specimens that were subsequently subjected to loading tests. Chemically prestressed concrete elements were tested for uniaxial tensile behaviour, in bond and flexural tests. Their behaviour was compared with this of non-prestressed ones. Measurements of expansion in time and investigations of the behaviour of tested specimens have confirmed that chemical prestressing of elements with textile reinforcement can be realized. In specimens subjected to tensile tests, concrete prestress estimated from expansion measurements corresponded very well with calculations from tensile tests results, prestressing effect was also observed in beams with steel reinforcement and large scale slab specimens with textile reinforcement. Furthermore, specimens made of expansive concrete shown a significantly higher cracking load in comparison to reference specimens made of concrete without expansive admixture. At the same time, no deterioration of concrete material properties was observed, on the contrary, compressive and tensile strength increased with an addition of expansive admixture and the modulus of elasticity remained on the same level. Finally, an overall performance index was calculated which described the performance of chemically prestressed specimens compared to the reference members.
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This report provides a summary of the present understanding of collapse-resisting mechanisms of reinforced concrete and post-tensioned flat plates, flat slabs, slabs with beams, joist floor systems, and precast floor systems following initial local failures.
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Easily implement high-quality and cost-effective projects using a variety of concrete, steel and beam building structures. Design, analyze, and document your building designs to save time and money. Maximize the roi of your software investment with a fully integrated set of applications for comprehensive analysis, design and documentation for steel and concrete structures. Increase your productivity by eliminating tedious and time-consuming tasks with practical RAM applications. Any kind of design: from individual components to large-scale construction and foundations.
RAM Structural System
Reliable equipment and rapid development of high-quality and economical projects using a variety of concrete, steel and beam building structures.
RAM Connection
Analysis, design and instant verification of all types of connections with comprehensive calculations and compliance with seismic requirements.
RAM Elements
Perform analysis and design – including 3D finite element analysis – of virtually any type of building structure and structural components in a single, accessible application.
RAM Concept
Cost-effective design of panels, base plates and foundations with exceptional visual inspection of compliance, efficiency and practicality of structures.
RAM SBeam
Specialized desktop application for the design of steel beams.
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