کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
260842 503671 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lightweight cement mortars: Advantages and inconveniences of expanded perlite and its influence on fresh and hardened state and durability
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Lightweight cement mortars: Advantages and inconveniences of expanded perlite and its influence on fresh and hardened state and durability
چکیده انگلیسی

Lightweight aggregates are frequently incorporated in renders to control dry bulk density and workability. Expanded perlite leads to water:cement (w:c) ratios higher than normal, especially in renders whose w:c ratios are higher due to the addition of cellulose ethers. Initially, this paper looks at the effect that perlite has on fresh-state parameters considered of great importance in renders: mixing water, density, consistence, workability and water retentivity. In addition, the role of perlite in sorptivity, water absorption and mechanical strength is also reported. The experiments show that mechanical strength, sorptivity and water absorption are negatively affected above 1.77%, while workable life and water retentivity are generally improved. The study is finished by quantifying the effect of agents such as water, hydrochloric acid and sodium sulfate on renders made with perlite. The effects are quantified by mass loss/gain measurements, water absorption tests are visually inspected using scanning electronic microscopy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 22, Issue 8, August 2008, Pages 1798–1806
نویسندگان
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