Historic Mortars


Book Description

This volume focuses on research and practical issues connected with mortars on historic structures. The book is divided into four sections: Characterisation of Historic Mortars, Repair Mortars and Design Issues, Experimental Research into Properties of Repair Mortars, and Assessment and Testing. The papers present the latest work of researchers in their field. The individual contributions were selected from the contributions to the 2nd Historic Mortars Conference, which took place in Prague, September, 22-24, 2010. All papers were reviewed and improved as necessary before publication. This peer review process by the editors resulted in the 34 individual contributions included in here. One extra paper reviewing and summarising State-of-the-Art knowledge covered by this publication was added as a starting and navigational point for the reader. The editors believe that having these papers in print is important and they hope that it will stimulate further research into historic mortars and related subjects.




Mortars in World War II


Book Description

Mortars were used throughout the Second World War by all armies and in all theatres. Although a very simple weapon they could greatly enhance the firepower of infantry formations, giving them their own mobile artillery arm. They repeatedly proved their worth in both offensive and defensive situations, breaking up or supporting infantry attacks and laying smoke or illumination rounds. Despite their ubiquity and effectiveness, there have been relatively few works devoted to these important and versatile weapons. John Norris give a brief history of the origins of the weapon and its use in the Great War before moving on to look in detail at the many types developed and used in the Second World War. The design and development of various types and their various munitions (HE, smoke and illumination) are discussed, including those incorporated into fixed defensive systems such as the Atlantic Wall, specialist variants developed for airborne units and those mounted on vehicles to provide mobile fire support. The tactics developed for their use and the structure of the support companies formed to utilize them are also examined in detail. And of course their combat history in the many theatres is outlined, using examples drawing on first-hand accounts of those that used them. This book is sure to be of great value to enthusiasts who collect mortars and their ammunition, re-enactors, modellers and wargamers as well as those readers interested in the history of weapons generally or those of World War II in particular.




Historic Mortars


Book Description

This book presents a state of the art in mortar characterisation, experimentation with and applications of new mortars for conservation and repair of historic buildings. This volume includes the following topics: characterisation of historic mortars (methods, interpretation, application of results), development of new materials for conservation (compatibility, durability, mix designs), the history of mortar technology and fundamental experimental studies of material properties. The papers have been selected from those presented at the 3rd Historic Mortars Conference, held in Glasgow, Scotland, September 11-14th 2013. All the papers here underwent a two stage peer review process, for the conference and again for this volume. In some cases this has resulted in a revision and updating of content.




Handbook of Polymer-Modified Concrete and Mortars


Book Description

Mortar and concrete made with portland cement has been a popular construction material in the world for the past 170 years or more. However, cement mortar and concrete have some disadvantages such as delayed hardening, low tensile strength, large drying shrinkage and low chemical resistance. To reduce these disadvantages, polymers have been utilized as an additive.Polymer-modified or polymer cement mortar (PCM) and concrete (PCC) are the materials which are made by partially replacing the cement hydrate binders of conventional cement mortar or concrete, with polymers. This book deals with the principles of polymer modification for cement composites, the process technology, properties and applications of the polymer-modified mortar and concrete, and special polymer-modified systems such as M DF cement, antiwashout underwater concrete, polymer-ferrocement, and artificial I wood.The polymeric admixtures or cement modifiers include latexes or emulsions, redispersible polymer powders, water-soluble polymers, liquid resins and monomers.This book describes the current knowledge and information of polymer-modified mortars and concretes, and discusses or reviews the following items in detail:1. Principles of polymer modification for cement composites.2. Process technology of polymer-modified mortars and concretes.3. Properties of polymer-modified mortars and concretes.4. Applications of polymer-modified mortars and concretes.5. Special polymer-modified systems such as MDF cements, antiwashout underwater concretes, polymer-ferrocements, and artificial woods.




Eco-efficient Rendering Mortars


Book Description

Eco-Efficient Rendering Mortars: Use of Recycled Materials focuses on the use of waste materials into cement-based renders, discussing the origins, treatment processes and properties of relevant wastes. The book dispels mistrust through demonstrating the technical feasibility and environmental benefits of eco-efficient rendering mortars. It considers the characteristics of different waste products, such as aggregates, fillers, binders and additions. The functional requirements of renders are also discussed alongside their impact. Finally, the title considers the lifecycle and durability of modified mortars. This book offers robust support and clear guidance on the use of wastes as a substitute for natural aggregates and binders. - Presents evidence supporting the use of wastes as a substitute for natural aggregates and binders - Characterizes wastes and considers how to best incorporate different kinds of waste into renders - Gives details on the technical efficiency and environmental impact of different waste materials on mortars - Analyzes the impact of wastes on render performance in terms of fresh state, mechanical, water and durability - Considers the lifecycle assessment and durability of modified mortars




Mortars and Cements


Book Description

L. J. Vicat's investigations into the nature and use of limes first appeared in this English language edition in 1837 translated by Captain J. T. Smith, with the inclusion of extensive notes on developments in England at that time. Vicat's work is of immense interest and importance as it critically reviews the practices of time, sifting the good ones from the bad by careful experiment. In addition he was able to take developments in lime a stage further, describing very simple procedures which would make it possible to assess the nature of lime from any deposit encountered. The classification which he prepared is still valid today and enables the best possible use to be made of any lime, particularly for hydraulic works. Despite being first published over 100 years ago, this is a very readable volume, and it will not just be of interest to conservation professionals and construction historians but everyone involved in the use of lime in buildings.




Tar for Mortar


Book Description

TAR FOR MORTAR offers an in-depth exploration of one of literature's greatest tricksters, Jorge Luis Borges. His short story "The Library of Babel" is a signature examplar of this playfulness, though not merely for the inverted world it imagines, where a library thought to contain all possible permutations of all letters and words and books is plumbed by pious librarians looking for divinely pre-fabricated truths. One must grapple as well with the irony of Borges's narration, which undermines at every turn its narrator's claims of the library's universality, including the very possibility of exhausting meaning through combinatory processing. Borges directed readers to his non-fiction to discover the true author of the idea of the universal library. But his supposedly historical essays are notoriously riddled with false references and self-contradictions. Whether in truth or in fiction, Borges never reaches a stable conclusion about the atomic premises of the universal library - is it possible to find a character set capable of expressing all possible meaning, or do these letters, like his stories and essays, divide from themselves in a restless incompletion? While many readers of Borges see him as presaging our digital technologies, they often give too much credit to our inventions in doing so. Those who elide the necessary incompletion of the Library of Babel compare it to the Internet on the assumption that both are total archives of all possible thought and expression. Though Borges's imaginings lend themselves to digital creativity (libraryofbabel.info is certainly evidence of this), they do so by showing the necessary incompleteness of every totalizing project, no matter how technologically refined. Ultimately, Basile nudges readers toward the idea that a fictional/imaginary exposition can hold a certain power over technology.




Latex-modified Concretes and Mortars


Book Description

This synthesis wil be of interest to materials engineers, construction engineers, maintenance engineers, pavement contractors and others interested in the use of latex-modified mortars (LMM) and concretes ( LMC). Information is provided on material properties of various LMM and LMC, as well as current construction practices used for LMM and LMC. Potential applications for LMM and LMC are also included. The use of innovative modified portland cement mortars and concretes for construction and maintenance applications is growing. This report of the Transportation Research Board describes the current state of the practice with respect to the use of latex-modified portland cement concretes and mortars. The extent of use of each material (including case histories), based on results of surveys of state highway agencies and a review of the literature, is summarized.




Handbook of Alkali-Activated Cements, Mortars and Concretes


Book Description

This book provides an updated state-of-the-art review on new developments in alkali-activation. The main binder of concrete, Portland cement, represents almost 80% of the total CO2 emissions of concrete which are about 6 to 7% of the Planet's total CO2 emissions. This is particularly serious in the current context of climate change and it could get even worse because the demand for Portland cement is expected to increase by almost 200% by 2050 from 2010 levels, reaching 6000 million tons/year. Alkali-activated binders represent an alternative to Portland cement having higher durability and a lower CO2 footprint. - Reviews the chemistry, mix design, manufacture and properties of alkali-activated cement-based concrete binders - Considers performance in adverse environmental conditions. - Offers equal emphasis on the science behind the technology and its use in civil engineering.




Effect of Mortar Properties on Strength of Masonry


Book Description

The physical properties of mortars, the bond strength of the mortars to masonry units, and the structural strength of concrete masonry and composite masonry walls containing the mortars are discussed and compared. All of the mortars were tempered to as wet a consistency as could be conveniently handled by the mason. The compressive strength of the walls increased, in general, with the compressive strength of the mortar. The racking and flexural strengths of the walls increased with the bond strength of the mortar. The strength of bond test specimens tended to increase with the compressive strength of the wet consistency mortars that were used. However, bond strength appeared to be the dominant factor affecting the racking and flexural strength of the walls. Increase in both bond strength and wall strength with compressive strength of the mortar was not proportional to the relative compressive strengths of the type N and type S mortars. The stiffness of walls subjected to compressive and flexural loads increased with the bond and compressive strength of the mortars. However, the stiffness of walls subjected to flexural loads appeared to be more dependent upon the number of bed joints in the tensile face and on their extension in bond than upon the bending strains in the masonry materials.