This document applies to the constituent materials, plant and equipment and production control systems used in the production of ready-mixed concrete.

This standard applies to ready-mixed concrete orders where the minimum compressive cylinder strength is specified by the purchaser. It does not apply to ready-mixed concrete orders where the purchaser specifies the mixture proportions, also referred to as prescribed mixes.

NOTE  This standard covers options A and C for ASTM C94/C94M and the designed mix of BS EN 206. Further information on the ASTM C94/C94M ordering options is outlined below:

–           Option A – This scenario applies where the producer assumes full responsibility for the selection of the proportions of the concrete mixture with the minimum compressive strength specified by the purchaser;

–           Option B – This scenario applies where the purchaser assumes responsibility for the proportioning of the concrete mixture; and

–           Option C – This scenario applies where the producer assumes full responsibility for the selection of proportions for the concrete mixture with the minimum allowable cement content and minimum compressive strength specified by the purchaser.

This document provides a framework for assessing compliance with the purchaser’s requirements. This document does not specify general, minimum quality requirements for ready-mixed concrete but assesses compliance on the basis of conformance to purchaser’s requirements. In addition, this document does not apply to the following:

–           concrete used in the construction of transportation infrastructure including highways, bridges, pavements and tunnels;

–           concrete used in the production of precast beams and columns;

–           non-volumetric site mixed concrete; and

–           the placement, consolidation, curing or protection of ready-mixed concrete.

NOTE: Ready-mixed concrete is produced to meet the purchaser’s requirements and the intended application, thus the properties of individual orders of ready-mixed concrete may vary.

This standard also outlines the mechanism to demonstrate compliance to the purchaser’s requirements and includes measures to be taken in the event of non-compliance.

This standard applies to appliances intended for use at either of the following nominal supply voltages:

1. 115 volts, with a relative tolerance of ± 6 %; or
2. 230 volts, with a relative tolerance of ± 6 %.

NOTE  These nominal supply voltages have been declared by the Trinidad and Tobago Electricity Commission (T&TEC) in their publication entitled “Wiring for Light and Power”. The Electricity Supply Rules made under Section 15 of the Electricity (Inspection) Act Chapter 54:72 provides for variations of six percent above or below the declared voltages.

This standard does not apply to appliances designed exclusively for industrial purposes or appliances intended to be used in locations where special conditions prevail, e.g. the presence of a corrosive or explosive atmosphere (caused by dust, vapour or gas).

This standard does not apply to electrical lighting products or electrical accessories or components.

a)  600/1000 V cables, wire armoured and oversheathed, having single-core, two-, three-, four- and five-core stranded copper conductor;
b)  600/1000 V multicore auxiliary cables, wire armoured and overheathed, stranded copper conductor; and
c)  1900/3300 V cables, wire armoured and oversheathed, having single-core or three-core stranded copper conductor.

This standard is applicable to electric cables that are designed for a maximum sustained conductor temperature of 90 °C and for a maximum short-circuit conductor temperature of 250 °C (for a maximum of 5 s).

NOTE Limitation on the temperature of the cables may be imposed in situations where they might be touched or where they could touch other materials.

a) which are used as human pharmaceuticals; or
b) utilised in an industrial setting, that is, active ingredients, bulk pesticide formulations destined for reformulation, repackaging or disposal or other pesticide formulation components.

1.Energy efficiency ratio (EER);
2.Coefficient of performance (COP).

This content is password protected. To view it please enter your password below:

Password:

This standard specifies requirements for vertical core, hollow building blocks, hereinafter called hollow blocks or blocks, made from clay, shale, fire clay, or mixtures thereof, and fired to incipient fusion.

This standard covers two grades of hollow blocks that are classified as Grade 1 and Grade 2.

The use of results from the testing of blocks extracted from masonry structures for determining conformance or non-conformance to the property requirements (see clause 5) of this standard is beyond the scope of this standard.

This standard does not apply to hollow blocks intended for use as paving blocks.

NOTE: The text of this standard refers to notes and footnotes that provide explanatory material.  These notes and footnotes (excluding those in tables and figures) should not be considered as requirements of the standard.

This document is applicable to all organizations performing laboratory activities, regardless of the number of personnel.

Laboratory customers, regulatory authorities, organizations and schemes using peer-assessment, accreditation bodies, and others use this document in confirming or recognizing the competence of laboratories.