AASHTO T 89-2013 Standard Method of Test for Determining the Liquid Limit of Soils.pdf
《AASHTO T 89-2013 Standard Method of Test for Determining the Liquid Limit of Soils.pdf》由会员分享,可在线阅读,更多相关《AASHTO T 89-2013 Standard Method of Test for Determining the Liquid Limit of Soils.pdf(12页珍藏版)》请在麦多课文档分享上搜索。
1、Standard Method of Test for Determining the Liquid Limit of Soils AASHTO Designation: T 89-13 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-1a T 89-1 AASHTO Standard Method of Test for Determining the Liquid Limi
2、t of Soils AASHTO Designation: T 89-13 1. SCOPE 1.1. The liquid limit of a soil is that water content, as determined in accordance with the following procedure, at which the soil passes from a plastic to a liquid state. 1.2. The following applies to all specified limits in this standard: For the pur
3、poses of determining conformance with these specifications, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand place of figures used in expressing the limiting value, in accordance with ASTM E29. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M
4、231, Weighing Devices Used in the Testing of Materials R 58, Dry Preparation of Disturbed Soil and Soil-Aggregate Samples for Test T 146, Wet Preparation of Disturbed Soil Samples for Test T 265, Laboratory Determination of Moisture Content of Soils 2.2. ASTM Standards: D4318, Standard Test Methods
5、for Liquid Limit, Plastic Limit, and Plasticity Index of Soils E29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications 3. APPARATUS 3.1. DishA porcelain dish, preferably unglazed, or similar mixing dish, about 115 mm in diameter. 3.2. SpatulaA sp
6、atula or pill knife having a blade about 75 to 100 mm in length and about 20 mm in width. 3.3. Liquid Limit Device: 3.3.1. Manually OperatedA device consisting of a brass dish and carriage, constructed according to the plan and dimensions shown in Figure 1. (See Note 1.) 2015 by the American Associa
7、tion of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-1a T 89-2 AASHTO Liquid Limit Device Grooving Tool Cup Assembly Base Curved End Gauge Dimension A B C N K L M a b c d e* Description Radius of Cup Thickness of Cup Depth of Cup Cup
8、 at Cam Follower to Base Thickness Length Width Thickness Cutting Edge Width Depth Length Metric, mm 54 2.0 27 47 50 150 125 10.0 2.0 13.5 10.0 15.9 Tolerance, mm 2 0.1 1 1.5 5 5 5 0.1 0.1 0.1 0.2 Note: Plate “H” may be designed for using one (1) securing screw (I). An additional wear tolerance of 0
9、.1 mm shall be allowed for dimension “b” for used grooving tools. Feet for base shall be of resilient material. (*) Nominal dimensions. All tolerances specified are plus or minus () except as noted above. Figure 1Manual Liquid Limit Device 3.3.2. Mechanically OperatedA motorized device equipped to p
10、roduce the rise and rate of shocks to a brass cup as described in Sections 5.2 and 6.3 of this procedure, respectively. The cup and the critical dimensions of the device shall conform to those shown in Figure 1 of this procedure. The device shall give the same liquid limit values as obtained with th
11、e manually operated device (Note 1). Note 1The base of the liquid limit device should have a resilience of at least 80 percent and not more than 90 percent when determined in accordance with the procedure given in the Appendix. 3.4. Grooving Tool: 3.4.1. Curved Grooving ToolA grooving tool conformin
12、g to the critical dimensions shown in Figure 1. The gauge need not be part of the tool. Shaft - (*) 76.2 mmOptionalRound end25.4-mm DiaNominal22.2-mm RadEnd Square60Grooving ToolabcdddeABCKIMHard RubberBrassNLFH 2015 by the American Association of State Highway and Transportation Officials.All right
13、s reserved. Duplication is a violation of applicable law.TS-1a T 89-3 AASHTO 3.4.2. Flat Grooving Tool (Alternate)A grooving tool made of plastic or noncorroding metal conforming to the critical dimensions shown in ASTM D4318, Figure 3. The gauge need not be part of the tool (Note 2). Note 2The flat
14、 grooving tool should not be used interchangeably with the curved grooving tool. There are some data that indicate that the liquid limit is slightly increased when the flat tool is used instead of the curved tool. 3.5. GaugeA gauge, whether attached to the grooving tool or separate, conforming to th
15、e critical dimension “d” shown in Figure 1 of this test method or “K” in Figure 3 of ASTM D4318, and may be, if separate, a metal bar 10.0 0.2 mm thick and approximately 50 mm long. 3.6. ContainersSuitable containers made of material resistant to corrosion and not subject to change in mass or disint
16、egration on repeated heating and cooling. Containers shall have close-fitting lids to prevent loss of moisture from samples before initial mass determination and to prevent absorption of moisture from the atmosphere following drying and before final mass determination. One container is needed for ea
17、ch moisture content determination. 3.7. BalanceThe balance shall have sufficient capacity and conform to M 231, Class G 1. 3.8. OvenA thermostatically controlled drying oven capable of maintaining temperatures of 110 5C for drying moisture samples. METHOD A 4. SAMPLE 4.1. A sample with a mass of abo
18、ut 100 g shall be taken from the thoroughly mixed portion of the material passing the 0.425-mm sieve that has been obtained in accordance with R 58 or T 146; for structural analysis use T 146, Method B. 5. ADJUSTMENT OF LIQUID LIMIT DEVICE 5.1. The Liquid Limit Device shall be inspected to determine
19、 that the device is in good working order; that the pin connecting the cup is not worn sufficiently to permit side play; that the screws connecting the cup to the hanger arm are tight; that the points of contact on the cup and base are not excessively worn; that the lip of the cup is not excessively
20、 worn; and that a groove has not been worn in the cup through long usage. The grooving tool shall be inspected to determine that the critical dimensions are as shown in Figure 1 of this test method or ASTM D4318, Figure 3. Note 3Wear is considered excessive when the point of contact on the cup or ba
21、se exceeds approximately 13 mm in diameter, or when any point on the rim of the cup is worn to approximately one half of the original thickness. Although a slight groove in the center of the cup is noticeable, it is not objectionable. If the groove becomes pronounced before other signs of wear appea
22、r, the cup should be considered excessively worn. Excessively worn cups shall be replaced. A base that is excessively worn may be refinished as long as the thickness does not exceed the tolerance shown in Figure 1 of this test method by more than 2.5 mm and the distance between the cup at the cam fo
23、llower and the base is maintained within the tolerances specified in Figure 1. 5.2. Adjust the height of drop of the cup so that the point on the cup that comes in contact with the base rises to a height of 10.0 0.2 mm. See Figure 2 for proper location of the gauge relative to the cup during adjustm
24、ent. Check the height of drop of the cup prior to each days testing. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-1a T 89-4 AASHTO Figure 2Calibration for Height of Drop Note 4A convenient procedur
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- AASHTOT892013STANDARDMETHODOFTESTFORDETERMININGTHELIQUIDLIMITOFSOILSPDF

链接地址:http://www.mydoc123.com/p-418353.html