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香港钢筋混凝土结构设计规范2013版.pdf简介：

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An estimate of the drying shrinkage strain of plain concrete &cs at any instant is given by the pr offivepartialcoefficients:

The elastic modulus forreinforcement should be taken as 2ookN/mm? .2.5 Physical properties Thefollowingmeanvaluesmaybeused: (a)density 7850 kg/m3; and (b)coefficient of thermal expansion 12x10%/C.

ng the relevant value. This curve may also be used for sustained loading.

3.2.7 Weldability

公安机关警犬基地建筑规划设计规范（公安部批准2015年1月施行）3.28.1General

1 0.95f 0.5f 20 2 2ey 0.5fy 4 5y 0.5f 4 4 Load in tensiontofailure Notes: 1. y is the strain of reinforcing bar at actual yield stress. 2. The actual ultimate tensile strength of the bar is obtained by testing samples from a referenced reinforcing bar. The test samples are obtained from the same referenced reinforcing bar.

2. The actual ultimate tensile strength of the bar is obtained by testing samples from referenced reinforcing bar. The test samples are obtained from the same reference reinforcingbar.

PRESTRESSING TENDONS

3.4PRESTRESSINGDEVICES

3.4.1.1 General

3.5 NEW MATERIALS

3.5.1 General

Acceptancerequiremel

SIGN STRENGTH AT ELEVATED TEMPERATI

Deteriorationofconcretebychemical chemicals, but is generally the result of exposure to acidic solution or to solutions of sulphate salts Where this is believed to be a potential problem. reference should be made to specialist literature.

4.2.4.1 Nominal Cover

4.2.4.2 Ends of straiaht bars

4.2.4.2Endsofstraightbars Cover is not required to the end of a straight bar in a floor or roof unit where its end is not exposed to theweather orto condensation

4.2.4.4Limitingvaluesfornominalcove

For reinforced concrete, the nominal cover required to all reinforcement for durability should be as specified in table 4.2. The nominal cover should also be applied to mechanical couplers, if used, unless themechanical couplers are madefrom materials with enhanced corrosionresistance.

For reinforced concrete, the nominal cover required to all reinforcement for durability should specified in table 4.2. The nominal cover should also be applied to mechanical couplers, if unless the mechanical couplers are made from materials with enhanced corrosion resistance

.2.5.4Adjustmenttocementcontentsfordifferentsizedaggregates The minimum cement contents given in tables 4.2 relate to 2o mm nominal maximum size of aggregate. For other sizes of aggregate they should be modified as given in table 4.3 subject to the condition that the cement content should be not less than 24o kg/m°for the exposure conditions covered by table 4.2.

【贵州省】《特色酒店设计、设施及服务评价规范DB 52/T 988-2015》Adjustmenttocementcontentsfordifferentsizedaggregates The minimum cement contents given in tables 4.2 relate to 20 mm nominal maximum si

Aajustmenttocementcontent oraifferentsizedaggregates The minimum cement contents given in tables 4.2 relate to 20 mm nominal maximum si aggregate. For other sizes of aggregate they should be modified as given in table 4.3 subject condition that the cement content should be not less than 24o kg/m for the exposure cond covered by table 4.2.

2.6Mix proportions

4.2.6.1 Genera

T， See clause 4.2.6.3 for adjustments to the mix proportions. 2. See clause 4.2.5.2for permitted reduction in concrete grade. 3. See clause 4.2.6.1 for concrete used in foundations to low rise strud soil conditions

(津)12J3-3 蒸压加气混凝土砌块墙Whena memberis designed as unreinforcedbut contains reinforcingbars,themember maybe treated as unreinforced for the purposes of this clause provided that any damage to the cover concrete or unsightliness that may result from corrosion of the bars is acceptable. 4.2.6.3Mixadjustments The cement contents given in table 4.4 apply to 20 mm nominal maximum size aggregate.For other sizes of aggregate they should be changed as given in table 4.3. Different aggregates require different water contents to produce concrete of the same workability and therefore at a given cement content, different water/cement ratios are obtained. In order to achieve a satisfactory workability at the specified maximum free water/cement ratio, it may be necessary to modify the mix as described in clause 4.2.6.1. When pfa or ggbs is used, the total content of cement plus pfa or ggbs should be at least as great as the values given in tables 4.2 and 4.4. In these conditions the word 'cement' in 'cement content' and