Lightweight granular materials made from mixed masonry rubble for use in infra-lightweight concrete

Figure: BAM

Fig. 1a: Lightweight granules, 2-4 mm ...

Figure: BAM

Fig. 1b: ... and 4-8 mm

Figure: BAM

Fig. 2a: Cut surface of concrete LG-800 with lightweight granules ...

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Fig. 2b: ... and concrete BG-800 with expanded clay

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Fig. 3: Development of compressive strength of the concretes with lightweight granules (LG-800) and expanded clay (BT-800), measured on cubes with an edge length of 150 mm. Specimens were covered with foil for up to 24 hours, then immersed in water for up to seven days, and finally stored at 65 % RH and 20 °C

Figure: BAM

Fig. 4: Development of expansion and shrinkage of the concretes with lightweight granules (LG-800) and expanded clay (BT-800), measured on 40 mm × 40 mm × 160 mm prisms after storage at 60 % RH and 21 °C

Figure: BAM

$Fig. 5: Progression of natural carbonation of ILC (LG-800) specimens. A phenolphthalein indicator solution was sprayed onto the fresh fracture surface, causing non-carbonated areas to turn pink. The fractured surface equaled 100 mm × 100 mm$ Figure: BAM

Fig. 5: Progression of natural carbonation of ILC (LG-800) specimens. A phenolphthalein indicator solution was sprayed onto the fresh fracture surface, causing non-carbonated areas to turn pink. The fractured surface equaled 100 mm × 100 mm

Figure: BAM

Using lightweight granular materials in infra-lightweight concrete appears to be promising for reducing its environmental footprint and thus enabling energy-efficient and sustainable construction. This article reports on lightweight granules, their use in infra-lightweight concrete, and related tests in comparison to conventional expanded clay.

Introduction

Infra-lightweight concrete exhibits an extremely low dry bulk density of up to 800 kg/m³ while also providing sufficient strength, resulting in low thermal and acoustic conductivity. This allows it to be used as exposed concrete in wall panels without requiring an additional insulating layer [1].

Using lightweight granular materials in infra-lightweight concrete appears to be promising for reducing its environmental footprint and thus enabling energy-efficient and sustainable construction. Lightweight granules are produced from mixed masonry rubble in a thermo-chemical process. In...

Issue 03/2020 Submitted by: IAB WEIMAR

Lightweight granular materials made from mixed masonry rubble for use in infra-lightweight concrete

Introduction

Related articles:

Innovation: Lightweight granules made of masonry rubble for R concrete

Lightweight aggregates – a new thermally bound lightweight aggregate of high resource efficiency

An innovative raw material for lightweight granules with a wide range of applications

Ecosphere technology for manufacture of infra- lightweight concrete

Panel 6: Lightwight concrete

Introduction

BFT 07/2024

BFT 07/2024

Related articles:

Innovation: Lightweight granules made of masonry rubble for R concrete

Lightweight aggregates – a new thermally bound lightweight aggregate of high resource efficiency

An innovative raw material for lightweight granules with a wide range of applications

Ecosphere technology for manufacture of infra- lightweight concrete

Panel 6: Lightwight concrete