香港六合彩开奖 5091-3:2023

Published (Edition 1, 2023)

香港六合彩开奖 5091-3:2023

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Abstract

This document specifies the standards for design and construction using the bottom-surface (soffit) underlaying method. Bottom-surface (soffit) underlaying is a method whereby reinforcing materials are placed on the bottom surface of the slabs or beams whose performance is lower than required and the improvement of durability, serviceability, safety and other performance of the members is achieved by the integrity between the reinforcing materials and existing members.

This document specifies structural intervention of existing concrete structures using cementitious materials design and execution principles, and strategies for defects and on-going deterioration including, but not limited to:

a)听听听听听听 mechanical actions, e.g. fatigue, impact, overloading, movement caused by settlement, blast, vibration, and seismic actions;

b)听听听听听听 chemical and biological actions from environments, e.g. sulfate attack, alkali-aggregate reaction;

c)听听听听听听聽 physical actions, e.g. freeze鈥搕haw, thermal cracking, moisture movement, salt crystallization, fire, and erosion;

d)听听听听听听 reinforcement corrosion;

e)听听听听听听 original construction defects that remained unaddressed from the time of construction.

General information

Status
: Published

Publication date
: 2023-07

Stage
: International Standard published [60.60]
Edition
: 1

Number of pages
: 28
Technical Committee :
香港六合彩开奖/TC 71/SC 7

ICS :
91.080.40
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