The “Code Requirements for Environmental Engineering Concrete Structures” (Code) portion of this document covers the structural design, materials selection, and construction of environmental engineering concrete structures. Such structures are used for conveying, storing, or treating water and wastewater, other liquids, and solid waste. The term “solid waste” as used in the Code encompasses the heterogeneous mass of disposed-of materials, as well as more homogeneous agricultural, industrial, and mineral wastes.
The Code also covers the evaluation of existing environmental engineering concrete structures.
Environmental engineering concrete structures are subject to uniquely different loadings and severe exposure conditions that require more restrictive serviceability requirements and may provide longer service lives than non-environmental structures.
Loadings include normal dead and live loads, earth pressure loads, hydrostatic and hydrodynamic loads, and vibrating equipment loads. Exposures include concentrated chemicals, alternate wetting and drying, high-velocity flowing liquids, and freezing and thawing of saturated concrete. Serviceability requirements include liquid-tightness, gas-tightness, and durability.
Proper design, materials, and construction of environmental engineering concrete structures are required to produce serviceable concrete that is dense, durable, nearly impermeable, and resistant to relevant chemicals, with limited deflections and cracking. This includes minimizing leakage and control over the infiltration of, or contamination to, the environment or groundwater.
The Code presents additional material as well as modified portions of the ACI 318-05, ACI 318-08, and ACI 318-11 building codes that are applicable to environmental engineering concrete structures.
The Commentary discusses some of the considerations of the committee in developing the ACI 350 Code, and its relationship with ACI 318. Emphasis is given to the explanation of provisions that may be unfamiliar to some users of the Code. References to much of the research data referred to in preparing the Code are given for those who wish to study certain requirements in greater detail.
The chapter and section numbering of the Code are followed throughout the Commentary.
Among the subjects covered are: drawings and specifications, inspections, materials, concrete quality, mixing and placing, forming, embedded pipes, joints, reinforcement details, analysis and design, strength and serviceability, flexural and axial loads, shear and torsion, development of reinforcement, slab systems, walls, footings, precast concrete, prestressed concrete, shell structures, folded plate members, provisions for seismic design, and an alternate design method in Appendix A.
The quality and testing of materials used in the construction are covered by reference to the appropriate standard specifications. Welding of reinforcement is covered by reference to the appropriate AWS standard. Criteria for liquid-tightness and gas-tightness testing may be found in ACI 350.1.
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This guide assists parking structure owners, operators, and the consultants who advise them and who develop maintenance recommendations as required by ACI 562, in developing preventive maintenance programs for parking structures. It presents typical maintenance concerns and suggests ways of addressing them. The guide summarizes information regarding structural, operational, aesthetic, and routine maintenance for parking structures. Design
suggestions to minimize maintenance are also included. A structural maintenance checklist of specific recommended tasks and references to other publications with information related to the structural maintenance of parking structures is included. Refer to ACI 362.1R for more complete information regarding design issues related to the performance of a parking structure.
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The use of ground calcium carbonate (GCC) and other mineral fillers can enhance the performance, economy, and sustainability of concrete mixtures. Modifications to the conventional proportioning method in ACI 211.1 are needed to incorporate these materials. This guide describes GCC and dust-of-fracture aggregate mineral fillers, including their properties, characterization, and qualification, and effects on concrete properties and sustainability. Recommendations are provided for proportioning concrete mixtures with these materials.
Keywords:
aggregate mineral filler; dust-of-fracture; ground calcium carbonate; ground lime
Code:
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This report provides general information regarding the evaluation of corrosion damage in structures reinforced with grouted multistrand and bar tendons. A review of current practice is included along with the historical background. Specific potential problem areas for grouted tendons are discussed for each critical part of the tendon. Current methods for evaluating corrosion damage and typical repair schemes are included.
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Architectural precast concrete is a subcategory of concrete construction that involves the same basic entities as other concrete construction, but is cast in a plant and has a more decorative appeal by using color, texture, distinguished surface finishes, or all of these. This document outlines the responsibilities for various parties of the design/construction team for architectural precast concrete projects and does not necessarily apply to concrete or precast concrete in general.
Keywords:
architect; architectural precast concrete; construction manager; general contractor; owner; precaster; specialty structural engineer; structural engineer of record.
Code:
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The need to control volume change induced primarily by temperature change in mass concrete often requires thermal control of concrete. This report reviews these thermal control methods such as precooling, postcooling, and insulating systems. A simplified method for computing the temperature of freshly mixed concrete cooled by various systems is also presented.
Keywords:
cement content; coarse aggregate; creep; formwork; heat of hydration; mass concrete; modulus of elasticity; precooling; postcooling; pozzolan; restraint; specific heat; strain; stress; temperature rise; tensile strength; thermal conductivity; thermal diffusivity; thermal expansion; thermal gradient; thermal shock.
Code:
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This guide describes the technology and applications of fiber-reinforced shotcrete (FRS) with a focus on synthetic and steel macrofibers. It serves as a bridge between information given in documents reported by ACI Committee 506 and ACI Committee 544. Proportions of typical mixtures, batching, mixing, and application procedures are described, including modification of mixture proportions and equipment needed for FRS. General performance criteria of FRS, particularly postcracking flexural strength and toughness, are described along with other typical properties and benefits, such as increased resistance to shrinkage cracking and impact resistance. Corresponding test methods are also discussed. The document presents general FRS design considerations. Applications of FRS are described, including construction and repair of tunnel and mining linings, slope stabilization, retaining structures, fire-explosive-spalling-resistant linings, and architectural structures. The report also gives guidance on the specification and quality control of FRS.
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Posted by: pezhmankhan - 12-03-2021, 06:26 AM - Forum: Archive
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ASCE 7-22, Minimum Design Loads and Associated Criteria for Buildings and Other Structures
Edition: 2022 Publish Date: 2022 ISBN: 9780784483497 Published By: ASCE Related Links:
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ACI 562-21
Assessment, Repair, and Rehabilitation of Existing Concrete Structures - Code and Commentary
Possible source is as below:
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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.
Code:
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