ASTM C1686 - 09 (2017)

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Designation: C1686 −09 (Reapproved 2017)

Standard Practice for

Installation and Testing of Reinforced Autoclaved Aerated

Concrete (AAC) Units

This standard is issued under the ﬁxed designation C1686; the number immediately following the designation indicates the year of

original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A

superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This practice covers the installation and testing of solid,

reinforced units made from autoclaved aerated concrete

(AAC), a cementitious product addressed by Speciﬁcation

C1693. The units are large-sized, factory-reinforced, solid

rectangular prisms, laid using thin-bed mortar.

1.2 The values stated in inch-pound units are to be regarded

as standard. The values given in parentheses are mathematical

conversions to SI units that are provided for information only

and are not considered standard.

1.3 The values stated in inch-pound units are to be regarded

as standard. The values given in parentheses are mathematical

conversions to SI units that are provided for information only

and are not considered standard.

1.4 This international standard was developed in accor-

dance with internationally recognized principles on standard-

ization established in the Decision on Principles for the

Development of International Standards, Guides and Recom-

mendations issued by the World Trade Organization Technical

Barriers to Trade (TBT) Committee.

2. Referenced Documents

2.1 ASTM Standards:

C1693 Speciﬁcation for Autoclaved Aerated Concrete

(AAC)

3. Classiﬁcation

3.1 Reinforced AAC units installed in accordance with this

practice shall be classiﬁed according to their strength class.

4. Materials and Manufacture

4.1 Reinforced AAC units installed in accordance with this

practice shall be composed entirely of AAC material conform-

ing to Speciﬁcation C1693. The units themselves shall conform

to Speciﬁcation C1693.

5. Signiﬁcance and Use

5.1 This practice is intended to regulate the installation of

reinforced AAC units and to provide test methods for deter-

mining their transverse load-displacement characteristics and

load-carrying capacities.

6. Shipping and Handling of Reinforced AAC Reinforced

Element

6.1 Reinforced AAC elements shall be protected from

damage during shipping by placement on pallets or other

supports, banding of the elements, placement of material

between the elements, or any other method deemed appropriate

by the AAC manufacturer. Reinforced AAC elements should

be handled using lifting devices or clamps recommended by

the AAC manufacturer.

7. Repair of Reinforced Elements

7.1 Damage from handling or shipping of reinforced AAC

elements shall be repaired using special AAC repair mortars. If

the damage is severe, the AAC manufacturer shall be consulted

as to the structural integrity of the element. Damage that results

in exposure of the reinforced element shall be repaired only

after the exposed steel is coated with a corrosion-resistant

coating as recommended by the AAC manufacturer.

8. Field Cutting of Reinforced Elements

8.1 Do not ﬁeld-cut reinforced elements unless approved by

the project engineer and performed in accordance with the

AAC manufacturer’s recommendations.

9. Rejection

9.1 If, upon delivery, an individual element fails to conform

to this practice, the manufacturer shall be permitted to repair

the element to satisfy the speciﬁcation, or to replace the

element.

10. Expense of Tests

10.1 Except as speciﬁed in Section 9, and unless otherwise

agreed, the expense of inspection and testing shall be the

responsibility of the purchaser.

This practice is under the jurisdiction of ASTM Committee C27 on Precast

Concrete Products and is the direct responsibility of Subcommittee C27.60 on

Precast Autoclaved Aerated Concrete.

Current edition approved June 1, 2017. Published July 2017. Originally approved

in 2009. Last previous edition approved in 2009 as C212–09. DOI: 10.1520/C1686-

09R17.

For referenced ASTM standards, visit the ASTM website, www.astm.org, or

contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM

Standards volume information, refer to the standard’s Document Summary page on

the ASTM website.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the

Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

11. Installation of Reinforced AAC Units

11.1 Installed units covered by this practice shall be

protected against direct exposure to moisture using a coating

material accepted by the AAC unit manufacturer.

NOTE 1—The rest of this section is blank until installation requirements

are developed.

12. Determination of Transverse Load-Displacement

Characteristics of Reinforced AAC Elements

12.1 Scope—The scope of this practice is to determine the

deﬂection and the load bearing capacity (ultimate load) of these

elements.

12.2 Apparatus:

12.2.1 The testing machine shall allow a service load to be

imposed with an accuracy of 5 % and an ultimate load with an

accuracy of 2 %.

12.2.2 The testing machine shall support the reinforced

element on two simple supports made of steel. One support

shall be ﬁxed in the plane of the element, and the other shall be

free to move in that plane. The supports shall support the entire

width of the element. The bearing length shall be adjustable, so

that the minimum bearing length shall be equivalent to the least

bearing length supplied by the manufacturer or a minimum of

1.6 in. (40 mm).

12.2.3 The deﬂection gauge shall allow the deﬂection to be

determined with a precision of 0.02 in. (0.5 mm).

12.3 Test Specimens—The test specimens shall consist of

complete reinforced AAC elements as supplied by the AAC

manufacturer. The elements to be tested shall have attained the

same temperature as the testing environment. The moisture

content of the specimens shall be between 10 and 40 % by

mass as determined by Speciﬁcation C1693. If the dry density

of the AAC material is known to an accuracy of 5 %, then the

moisture content shall be permitted to be determined by

calculation based on the mass and volume of the element and

the mass of the reinforcement. The mass of the specimens shall

be determined before testing to an accuracy of 10 lb (4.5 kg).

Report the moisture content of the AAC at time of test.

12.4 Procedure:

12.4.1 Apply equal loads to the two quarter points as shown

in Fig. 1. Apply the loads through steel shapes placed on soft

ﬁberboard with a thickness of 0.4 to 0.50 in. (10 to 12 mm).

The steel proﬁles shall have sufficient bearing area to produce

an even bearing pressure not exceeding 50 % of the speciﬁed

compressive strength of the AAC material. The bearing area

shall cover the entire width of the element, and its extension

along the length of the element shall not be less than 4 in. (100

mm).

12.4.2 Measure out-of-plane deﬂection at midspan, either

on both sides of the element or in the center. Take the ﬁrst

deﬂection reading when the element is resting on the supports

without any imposed load. Then place the loading apparatus in

position and apply load, at a rate sufficient to reach the service

load after 2 min. Maintain the service load for 5 min while

inspecting the element for cracking. If cracks are found,

measure their width at a level corresponding to the bottom of

the reinforcement. After that 5-min period, measure and record

the deﬂection of the element under service load. Then load the

element to failure within a period not less than 2 min. Record

the failure load and failure mode. Before removing the element

from the testing apparatus, record the number and size of all of

the reinforcing wires and their AAC cover.

13. Precision and Bias

13.1 The precision and bias of the test procedures are being

determined and will be provided when sufficient data are

available to indicate acceptable tolerances in repeatability and

reproducibility.

14. Keywords

14.1 AAC; autoclaved aerated concrete; installation; load-

displacement characteristics; reinforced autoclaved aerated

concrete

NOTE 1—Position of Applied Loads:

= clear span,

= bearing length of support, and

= imposed test load.

FIG. 1 Transverse Loading (Flexural) Test

C1686 − 09 (2017)

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned

in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and

if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the

responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should

make your views known to the ASTM Committee on Standards, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above

address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website

(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222

Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/

C1686 − 09 (2017)

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摘要：

ASTM C1686 - 09 (2017) 是ASTM国际标准组织发布的一项关于建筑隔热材料现场测试与性能评估的标准规范，专门用于指导在既有建筑或新建工程中，通过非破坏性方法测量隔热层的热阻及安装质量。该标准详细规定了测试仪器的校准要求、现场环境条件控制、数据采集步骤及结果报告格式，适用于玻璃纤维、矿棉、泡沫塑料等多种常见隔热材料的现场验证。遵循ASTM C1686-09(2017)能有效帮助工程质检人员、能源审计师及建筑承包商准确判断隔热层是否存在空洞、压缩或受潮等问题，从而提升建筑能效并避

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