AS 1289.4.3.1:2021 pdf free download.Methods of testing soils for engineering purposes Method 4.3.1: Soil chemical tests – Determination of the pH value of a soil – Electrometric method.
AS 1289.4.3.1 covers the electrometric determination of the pH value of a soil-suspension.
NOTE The pH value a sample groundwater can be measured in a similar manner to that used for a
soil-suspension.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document.
NOTE Documents referenced for informative purposes are listed in the Bibliography.
AS 1289.1.1, Methods of testing soils for engineering purposes, Method 1.1: Preparation of disturbed soil samples for testing
ISO 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal plate
3 Terms and definitions
No terms and definitions are listed in this document.
4 Apparatus
The following apparatus are required:
(a) pH meter, covering at least the range pH 3.0 to pH 13.0, fitted with a scale that is readable and accurate to 0.05 pH units.
NOTE 1 Soils with high p11 values, such as stabilized soils and naturally occurring soils with a pH in excess of 10, should use an electrode reading to pH 13.0 as other electrodes would be adversely affected.
NOTE 2 The pH meter manufacturer’s instructions should be followed.
(b) Balance of at least 100 g capacity, with a limit of performance not greater than ± 0.05g.
(c) 100 mL glass beakers, with cover glasses and stirring rods.
(d) Wash-bottle, preferably plastic, containing distilled water.
(e) 2.36 mm sieve, conforming to ISO 3310-2.
(f) Thermometer, readable and accurate to 1 °C
5 Reagents
The following reagents of analytical reagent (AR) grade are required:
(a) Buffer solutions — p11 40. pH 9.2 and other pH levels within 2 pH units of the soil being measured as required.
(b) Potassium chloride — Saturated solution, for maintenance of calomel electrode.
(c) Distilled water — pH of between 6.75 and 7.25. stored in a sealed container.
6 Procedure
Tests shall be performed within the temperature range of 15 °C to 25 °C.
The procedure shall be as follows:
(a) Obtain a sample which has been prepared in accordance with the procedure for the preparation of disturbed samples for testing specified in AS 1289.1.1. Remove all particles by sieving over the 2.36 mm sieve. Do not oven dry the sample.
By riffling or quartering, obtain a sample of about 35 g from the material passing the sieve. NOTE 1 The soil should be sufficiently dry so that It will pass the sieve.
NOTE 2 The preparation the sample from either an air-dried or natural state will produce different results. Therefore, it is recommended that samples are tested in the natural state.
(b) Transfer 30 ± 0.Olg of the sample into a 100 mL beaker and add 75 ± 0.05 g of distilled water. The temperature of the water shall be in equilibrium with the testing environment before commencing the test.
Stir the suspension regularly in the first 30 mm, then cover the beaker with a cover glass and allow it to stand for at least 60 mm.
NOTE 3 Highly plastic clays can require longer saturation to break up the clay particles.
NOTE 4 For stabilized soils, the standing time should be not more than 2h, otherwise irreversible changes can take place in the stabilizers.
(c) Calibrate the pH meter using standard buffer solutions, in accordance with the manufacturer’s procedures.AS 1289.4.3.1 pdf download.
Tags: Methods of testing soils for engineering purposes
-
AS/NZS 60335.2.11:2020 pdf free download.Household and similar electrical appliances- Safety Part 2.11: Particular requirements for tumble dryers (IEC 60335-2-11 Ed 8, MOD). 7.10 Addition: If the off position is only indicated by letters, the word “off” shall be used. 7.12 Addition: The instructions shall state — the maximum mass of dry textile material in kilograms to be used in the appliance; — that the tumble dryer is not to be used if industrial chemicals have been used for cleaning; — that the lint trap has to be cleaned frequently, if applicable; — that lint must not to be allowed to accumulate around the tumble dryer (not applicable for appliances intended to be vented to the exterior of the building); — that adequate ventilation has to be provided to avoid the back flow of gases into the room from appliances burning other fuels, including open fires (this instruction is not required if the tumble dryer discharges the air into the room). If symbol ISO 7000-0790 (2004-01) is used, its meaning shall be explained. The instructions shall include the substance of the following. — Do not dry unwashed items in the tumble dryer. — Items that have been soiled with substances such…
-
AS ISO 37100:2020 pdf free download.Sustainable cities and communities 一Vocabulary. 1 Scope This document defines terms relating to sustainable development in communities, smart community infrastructure and related subjects. 2 Normative references There are no normative references in this document. 3 Terms and definitions ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at http://www.iso.orgJobp — IEC Electropedia: available at httwwwe1e1ropetha.orgJ 3.1 Terms relating to sustainable development, resilience and smartness 3.1.1 sustainability state of the global system, including environmental, social and economic aspects, in which the needs of the present are met without compromising the ability of future generations to meet their own needs Note I to entry: The environmental, social and economic aspects interact, are interdependent and are often referred to as the three dimensions of sustainability. Note 2 to entry: Sustainability is the goal of sustainable development. [SOURCE: ISO Guide 82:2014, 3.1] 3.1.2 sustainable development development that meets the environmental, social and economic needs of the present without compromising the ability of future generations to meet their own needs Note ito entry: Derived from the Brundtland Report. Note 2 to entry: The Aalborg Charter provides further information on…
-
AS ISO 37104:2020 pdf free.Sustainable cities and communities – Transforming our cities一Guidance for practical local implementation of AS IsO 37101. This document provides guidance on how to implement and maintain a management system for sustainable development based on ISO 37101 principles, specifically in the context of cities, but applicable to other forms of settlement. This document: — provides guidance for practical implementation ofa managernentsystem for sustainable development in cities and other settlements, based on ISO 37101; — establishes a methodological framework forthe systematic evaluation ofthe sustainable development schemes and achievements in the city or other settlements, based on the cross-analysis of the six purposes of sustainability and the 12 areas of action of ISO 37101; — illustrates how other International Standards can be used to support successful implementation of ISO 37101, including, in particular, ISO 37120 (which recommends a suite of city indicators mapped against the six purposes of ISO 37101) and ISO 37106 (which provides practical guidance on how to implement joined-up delivery and innovation across organizational boundaries within the city or settlement). This document is intended for organizing bodies, decision-makers, executive officers and managers in cities — usually, in the first instance, the relevant local governments. This document…