University of applied sciences Nuremberg GEORG SIMON OHM

Improving the thermal insulation properties of thin-bed mortar Part I: Impact evaluations of various admixtures on material engineering parameters

Monolithic walls erected with an appropriately modified thin-bed mortar should show superior thermal insulation properties. Admixing 10 vol.% fumed silica proved to reduce by 19% the thermal conductivity of a typical thin-bed mortar belonging to compressive strength class M 10. Simultaneously, it also improved the mortar’s compressive strength by nearly 16 %. The investigations also showed that an admixture of expanded perlite can increase the compressive strength by 99 %.

1 Introduction

Thin-bed cement mortar is often used for masoning up such precision-ground, monolithic wall-building materials as bricks, autoclaved aerated concrete units (Ytong), or building blocks of pumicite, expanded clay or sandy limestone [1–3]. The corresponding material engineering parameters are governed by the applicable DIN specifications [4–7], which prescribe, for example, a compressive strength level of βD ≥ 10.0 MPa for class-M 10 mortar after 28 days of curing [8].

According to one market analysis, the thermal conductivity of products in this mortar category has been stagnating...

Related articles:

Issue 2018-9 UNIVERSITY OF APPLIED SCIENCES NUREMBERG GEORG SIMON OHM

Improving the thermal insulation properties of thin-bed mortar|Part II: Effects of selected admixtures and combinations thereof on material properties, in particular pore-size distribution, thermal conductivity and compressive strength

1 Introduction and objectives The main objective of the subject research work was to develop a new type of thin-bed mortar characterized by reduced thermal conductivity with no loss of compressive...

more
Issue 2018-10 UNIVERSITY OF APPLIED SCIENCES NUREMBERG GEORG SIMON OHM

Effects of fumed silica on material engineering parameters of external rendering, with special emphasis on thermal conductivity and compressive strength

1 Introduction and objectives The main prerequisite for energy-efficient operation of residential and non-residential buildings is that they are appropriately insulated against heat loss. While...

more
Issue 2018-4 ISLAMIC AZAD UNIVERSITY

Experimental study of the effect of water-to-cement ratio on various properties of nano silica concretes with polypropylene fibers

1 Introduction The use of various additives in concrete and cement products has attracted special attention in recent years. So far, many researches have been carried out on fiber concrete, but...

more
Issue 2016-4 WUHAN UNIVERSITY OF TECHNOLOGY OFFICE OF REFORMATION OF WALL MATERIAL AND ENERGY-EFFICIENT BUILDING

Research on the interface and ­microstructure of thin layer mortar

1 Introduction Thin layer mortar has been mostly considered as a special mortar, which possesses high water-cement ratio and high area/volume ratio [1].The common problem of the thin layer mortar...

more
Issue 2015-7-8 WO?2015/086453?A1

Accelerating admixture for cementitious compositions

(22) 05.12.2014 (43) 18.06.2015 (57) The present invention describes a hardening accelerating admixture for hydraulic binders, the accelerator being based on transition metal silicate hydrates having...

more