ISO 17785-2:2018 PDF

Testing methods for pervious concrete — Part 2: Density and void content

Название (английский):

ISO 17785-2:2018

Testing methods for pervious concrete — Part 2: Density and void content

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 11 мая 2018 г.
Издание:: ISO IS 17785 edition 1 version 1
ICS:: 91.100.30

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Описание (английский):

This document specifies a procedure for testing the density and void content of freshly mixed and hardened pervious concrete specimens for pavement in the laboratory or cored from field placements. This document also specifies formulae for calculating the density and void content of pervious concrete.

Технические детали

Технический комитет: ISO/TC 71/SC 1 - Test methods for concrete
SKU: ISO 17785-2:2018

Abstract

Overview

ISO 17785-2:2018 - "Testing methods for pervious concrete - Part 2: Density and void content" specifies laboratory and field procedures to determine the density and void content of both freshly mixed and hardened pervious concrete used for pavements. The standard covers sampling, required apparatus, step‑by‑step test procedures, and the formulae for calculating density and void percentage for specimens made in the lab or cored from field placements.

Key topics and technical requirements

Scope and purpose
- Measures density (kg/m3) and void content (%) of pervious concrete to verify mixture proportions and permeability-related properties.
Specimen types
- Fresh samples consolidated in a cylindrical measure.
- Hardened specimens: moulded cylinders (nominal 100 mm diameter, height twice diameter) or field cores (minimum 100 mm diameter and 100 mm height).
Sampling
- Minimum of three similar specimens per test.
Apparatus and accuracy
- Measure (≥150 mm internal dimensions), strike‑off plate, coring machine, non‑reactive moulds.
- Balance accurate to 0.5 g or 0.3% of load; calipers to 0.25 mm.
- Oven capable of 50 °C ± 5 °C; water bath and thermometer (±0.5 °C).
Fresh concrete procedure
- Two layers placed and consolidated; typical consolidation: 20 hammer drops per layer at 300 mm drop height (hammer ~4.5 kg suggested).
- Strike off, clean, and weigh measure plus concrete to compute fresh density.
Hardened concrete procedure
- Measure dimensions, dry to constant mass (oven at 50 °C ± 5 °C in 24 h increments until mass change

Overview

Key topics and technical requirements

Scope and purpose
- Measures density (kg/m3) and void content (%) of pervious concrete to verify mixture proportions and permeability-related properties.
Specimen types
- Fresh samples consolidated in a cylindrical measure.
- Hardened specimens: moulded cylinders (nominal 100 mm diameter, height twice diameter) or field cores (minimum 100 mm diameter and 100 mm height).
Sampling
- Minimum of three similar specimens per test.
Apparatus and accuracy
- Measure (≥150 mm internal dimensions), strike‑off plate, coring machine, non‑reactive moulds.
- Balance accurate to 0.5 g or 0.3% of load; calipers to 0.25 mm.
- Oven capable of 50 °C ± 5 °C; water bath and thermometer (±0.5 °C).
Fresh concrete procedure
- Two layers placed and consolidated; typical consolidation: 20 hammer drops per layer at 300 mm drop height (hammer ~4.5 kg suggested).
- Strike off, clean, and weigh measure plus concrete to compute fresh density.
Hardened concrete procedure
- Measure dimensions, dry to constant mass (oven at 50 °C ± 5 °C in 24 h increments until mass change

ISO 17785-2:2018 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

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