Specification for Prefaced Concrete and Calcium Silicate Masonry Units

2008 ◽  
Author(s):  
Keyword(s):  
Calcium Silicate ◽  
Masonry Units

Simulation-Based Optimization of the Energy Consumption in the Hardening Process for Calcium Silicate Masonry Units

2015 ◽  
Vol 805 ◽  
pp. 249-256 ◽  
Author(s):  
Toni Donhauser ◽  
Jens Ehrhardt ◽  
Tobias Rackow ◽  
Jörg Franke ◽  
Peter Schuderer
Keyword(s):  
Carbon Dioxide ◽  
Energy Consumption ◽  
Calcium Silicate ◽  
Carbon Dioxide Emissions ◽  
Process Step ◽  
Hardening Process ◽  
Simulation Based ◽  
Energy Consuming ◽  
Production Orders ◽  
Masonry Units

Owing to a high cost pressure and the need for a reduction of carbon dioxide emissions for manufacturing calcium silicate masonry units (CS), the CS-industry strives to cut the energy consumption. The most energy consuming process step is the autoclaving. About 87% of the energy is required for this particular process step, where the green bodies are steam-hardened at 200°C.For reducing the energy consumption, most of the alternatives aim at optimizing the complete manufacturing process. In this paper, the focus is put on an optimized loading process for the autoclaves, in consideration of preceding and subsequent process steps. For this purpose, a simulation model is developed, where different strategies of loading are implemented and tested. This model can be used to find optimally scheduled assignments of production orders to the available autoclaves, based on the volume of each manufactured product.The analysis of the tested strategies shows, that it is possible to save up to almost 9 % of the required energy for autoclaving by an optimized assignment of the available autoclaves.

scholarly journals PROPOSAL OF PROCEDURE FOR IDENTIFICATION OF MENÉTREY–WILLAM (M-W-3) PLASTICITY SURFACE OF HOMOGENEOUS AND HOLLOW MASONRY UNITS

2019 ◽  
Vol 11 (2) ◽  
pp. 40-49 ◽  
Author(s):  
Radosław Jasiński
Keyword(s):  
Calcium Silicate ◽  
Test Stand ◽  
Statistical Analyses ◽  
Triaxial Tests ◽  
Autoclaved Aerated Concrete ◽  
Custom Made ◽  
Aerated Concrete ◽  
Masonry Units ◽  
Elliptical Function

The article presents the author’s proposal to determine the parameters of the Mentérey–Willam (M-W-3) plasticity surface of the homogeneous masonry elements made of autoclaved aerated concrete (AAC) and vertically hollow calcium-silicate (Ca-Si) masonry units. The uniaxial and triaxial tests of AAC samples in a standard Hoek’s cell was performed while the hollow units made of silicate were tested on a custom-made test stand. By performing statistical analyses, the shape of the meridians of the surface was determined, and then the eccentricity e of the elliptical function was identified.

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