The Aggregates & Recycling Information Network

Glossary: Q

  • QA

    abbr. quality assurance

    The planned and systematic actions necessary to give confidence that a product or service will satisfy the necessary quality requirements. BS 5750 sets out the basis for the quality systems applicable.

  • Quadrant Bearing

    Quadrant bearings are measured from 0-90° east or west of north or south.

  • Quality Assurance

    The planned and systematic actions necessary to give confidence that a product or service will satisfy the necessary quality requirements. BS 5750 sets out the basis for the quality systems applicable.

    abbr. QA

  • Quality Control

    The operational procedures used to fulfill requirements for quality.

  • Quality Management

    The management functions which determine and implement a firm’s quality policy.

  • Quarry Block

    Roughly squared stone as shipped from the quarry.

    Also: block stone

  • Quartering

    The reduction of a sample to a desired volume by dividing a cone of material into four quarters and combining alternate quadrants. This is repeated until a sample of the required quantity is obtained.

  • Quartz

    Oxide of silicon SiO2 (silica). Common mineral in acid igneous rocks and forms bulk of sandstones and quartzites.

  • Quartzite

    A metamorphic variety of sandstone composed of grains of quartz cemented together by silica. It is a very hard rock usually whitish in colour.

  • Quicklime

    Product obtained when chalk or limestone is heated at a temperature high enough to drive off the carbon dioxide.

  • Quickset Level

    A levelling instrument supported on a ball-and socket joint instead of three levelling screws.