AASHTO T 158-11(2015)-ASTM C232-C232M-09

VIP免费

老杨树 2024-10-25 16 908.11KB 9 页 15星币

侵权投诉

Standard Method of Test for

Bleeding of Concrete

AASHTO Designation: T 158-11 (2015)

ASTM Designation: C232/C232M-09

American Association of State Highway and Transportation Officials

444 North Capitol Street N.W., Suite 249

Washington, D.C. 20001

TS-3b T 158-1 AASHTO

Standard Method of Test for

Bleeding of Concrete

AASHTO Designation: T 158-11 (2015)

ASTM Designation: C232/C232M-09

1. SCOPE

1.1. These test methods cover the determination of the relative quantity of mixing water that will bleed

from a sample of freshly mixed concrete. Two test methods that differ primarily in the degree of

vibration to which the concrete sample is subjected are included.

1.2. The two test methods are not expected to yield the same test results when samples of concrete

from the same batch are tested by each method. When various concretes are to be compared, all

the tests should be conducted using the same method, and the sample masses, if the batches are of

similar unit weight, should not differ by more than 1 kg [2 lb].

1.3. The values stated in either SI units or inch-pound units are to be regarded separately as standard.

The values stated in each system may not be exact equivalents; therefore, each system shall be

used independently of the other. Combining values from the two systems may result in non-

conformance with the standard.

1.4. This standard does not purport to address all of the safety concerns, if any, associated with its use.

It is the responsibility of the user of this standard to establish appropriate safety and health

practices and determine the applicability of regulatory limitations prior to use.

2. REFERENCED DOCUMENTS

2.1. AASHTO Standards:

 R 39, Making and Curing Concrete Test Specimens in the Laboratory

 R 60, Sampling Freshly Mixed Concrete

 T 121M/T 121, Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

2.2. ASTM Standard:

 C670, Standard Practice for Preparing Precision and Bias Statements for Test Methods for

Construction Materials

3. SIGNIFICANCE AND USE

3.1. This test method provides procedures to be used for determining the effect of variables of

composition, treatment, environment, or other factors in the bleeding of concrete. It may also be

used to determine the conformance of a product or treatment with a requirement relating to its

effect on bleeding of concrete.

TS-3b T 158-2 AASHTO

3.2. Method A—For a sample consolidated by rodding only and tested without further disturbance,

thus simulating conditions in which concrete, after placement, is not subjected to intermittent

vibration.

3.3. Method B—For a sample consolidated by vibration and tested with further intermittent periods of

vibration, thus simulating conditions in which concrete, after being placed, is subjected to

intermittent vibration.

METHOD A—SAMPLE CONSOLIDATED BY TAMPING

4. APPARATUS

4.1. Container—A cylindrical container of approximately 14-L [approximately 1/2-ft3] capacity, having

an inside diameter of 255 ± 5 mm [10 ± 1/4 in.] and an inside height of 280 ± 5 mm [11 ± 1/4 in.].

The container shall be made of metal having a thickness of 2.67 to 3.40 mm [0.105 to 0.134 in.]

and shall be externally reinforced around the top with a 2.67- to 3.40-mm [0.105- to 0.134-in.]

metal band, 40 mm [11/2 in.] wide. The inside shall be smooth and free from corrosion, coatings,

or lubricants.

4.2. Scale—Of sufficient capacity to determine the mass of the load required with an accuracy of

0.5 percent. Balances or scales shall be calibrated at least annually or whenever there is a reason to

question the accuracy of the equipment. Equipment not in operating condition or out of tolerance

shall be marked as such and taken out of service until corrected.

4.3. Pipet—Or similar instrument for drawing off free water from the surface of the test specimen.

4.4. Glass Graduate—Of 100-mL capacity for collecting and measuring the quantity of

water withdrawn.

4.5. Tamping Rod—A round, straight steel rod, with a 16 ± 2-mm [5⁄8 in. ± 1⁄16-in.] diameter. The

length of the tamping rod shall be at least 100 mm [4 in.] greater than the depth of the measure in

which rodding is being performed but not greater than 600 mm [24 in.] in overall length. The

length tolerance for the tamping rod shall be ±4 mm [±1⁄8 in.]. The rod shall have the tamping end

or both ends rounded to a hemispherical tip of the same diameter as the rod.

4.6. Metal Beaker (Optional)—A 1000-mL metal beaker for collecting the decanted supernatant water

and sludge (Note 1).

4.7. Balance (Optional)—A balance sensitive to 1 g for determining the mass of the decanted water

and sludge (Note 1).

4.8. Hot Plate (Optional)—A small electric hot plate or other source of heat for evaporating decanted

water (Note 1).

Note 1—The apparatus listed in Sections 4.6, 4.7, and 4.8 will be required if the procedure of

measuring the amount of bleeding water recovered is one involving weighing, evaporation,

and reweighing.

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

亲，本站95%以上的标准规范都面向会员免费，办理VIP会员下载更省钱，平均每篇不到2元

立即下载 VIP免费下载

摘要：

本页面详细介绍标准规范 AASHTO T 158-11(2015) 与 ASTM C232/C232M-09，该规范主要规定了用于测定新拌混凝土泌水性能的试验方法。内容涵盖试验原理、设备要求、操作步骤以及结果计算，适用于普通混凝土与轻质混凝土的泌水率评估。通过该标准，工程人员可以准确判断混凝土在拌合后至初凝前的水分离析程度，从而有效控制施工质量，提升混凝土结构耐久性。本规范由美国各州公路与运输官员协会（AASHTO）与美国材料与试验协会（ASTM）联合制定，常用于公路、桥梁、水工及建筑工程的混凝

展开>> 收起<<

AASHTO T 158-11(2015)-ASTM C232-C232M-09.pdf

共9页,预览4页

还剩页未读，继续阅读

声明：本文档系会员上传，若文档所含内容侵犯了您的版权或隐私，请立即通知，我们立即给予侵权申诉删除！

AASHTO T 158-11(2015)-ASTM C232-C232M-09

相关推荐

开通VIP享超值会员特权

相关内容

热门标签

举报选择: