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1997 | Buch | 3. Auflage

Stone in Architecture

Properties, Durability

verfasst von: Prof. Dr. Erhard M. Winkler

Verlag: Springer Berlin Heidelberg

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SUCHEN

Über dieses Buch

The readers of the first two editions of Stone: Properties, Durabi­ lity in Man's Environment, were mostly architects, restoration architects of buildings and monuments in natural stone, profes­ sionals who sought basic technical information for non-geologists. The increasing awareness of rapidly decaying monuments and their rescue from loss to future generations have urged this writer to update the 1973 and 1975 editions, now unavailable and out of print. Due to the 20-year-Iong interval, extensive updating was necessary to produce this new book. The present edition concentrates on the natural material stone, as building stone, dimension stone, architectural stone, and decorative field stones. Recently, the use of stone for thin curtain walls on buildings has become fashionable. The thin slabs exposed to anew, unknown complexity of stresses, resulting in bowing of crystalline marble, has attracted much negative pUblicity. The costs of replacing white slabs of marble on entire buildings with its legal implications have led construction com­ panies into bankruptcy. We blame many environmental problems on acid rain. Does acid rain really accelerate stone decay that much? Stone preservation is being attempted with an ever-increasing number of chemicals applied by as many specialists to save crumbling stone. Chemists filled this need during a time of temporary job scarcity, while the general geologist missed this opportunity; he was too deeply involved in the search for fossil fuels and metals.

Inhaltsverzeichnis

Frontmatter
1. Rock and Stone
Abstract
Rock is the basic building material of the earth’s crust and the original building material used by man to serve as protection from the severe ice age and post-ice age raw climate; shelters were made of assembled field stones to form a basic house. Stone was later elaborately shaped to satisfy man’s artistic expression.
Erhard M. Winkler
2. Physical Properties of Stone
Abstract
Stone is a heterogeneous substance characterized by a wide range of mineral compositions, textures, and rock structures. Consequently, the physical and chemical properties and the resulting durability are quite variable. The suitability of a stone for a given building can be easily tested in the laboratory. Although some tests are expensive and consume considerable amounts of rock material, others are simple, inexpensive, and nondestructive (see App. A).
Erhard M. Winkler
3. Natural Deformation of Rock and Stone
Abstract
Most rocks were exposed to stresses in the earth’s crust in the geologic past. Such stresses cause cracking and faulting when brittle rocks are exposed to damaging earthquakes. Plastic folding occurs under slower long-term conditions. Stresses are compressional, tensional, or shear. The variety and combination of deformational features is complex and almost unlimited. Only the features that directly influence the stone industry will be discussed. These are esthetic appearance, safety in the quarry and on buildings, and damage to stone blocks by earthquakes.
Erhard M. Winkler
4. Color and Color Stability of Stone
Abstract
The color of structural and monumental stone has challenged the architect for the most effective and harmonious appearance in architectural design since ancient times. The utilization of different color shades of stone has given new life to many existing structures. Stone colors are influenced by the color of the predominant mineral, but also by the adjacent minerals, grain size, and grain cement.
Erhard M. Winkler
5. Weathering Agents
Abstract
The decay of stone and concrete in engineering structures and monuments is closely related to the geologic process of rock weathering. Most of the decay progresses near or at the ground surface, influenced by the following weathering agents: atmosphere, rainwater, rising ground moisture, stream water, lake water, and seawater. The atmosphere, rainwater, and rising ground moisture, with or without dissolved salts, are most instrumental in the decay of building and decorative stone. The influence of plants, bacteria, and animals on stone decay is discussed in separate chapters.
Erhard M. Winkler
6. Moisture and Salts in Stone
Abstract
Moisture and salts are the most damaging factors in stone decay. The complexity of the capillary properties of a stone determines the hygric properties that are induced in buildings and monuments by moisture. The mechanism of moisture movement in stone in its different states is complex and not yet fully understood. Many field data are compiled from deserts and both humid and arid urban environments. Sources of moisture, moisture transfer in complex capillary systems of masonry walls, and the origin and action of salts are discussed for different climates.
Erhard M. Winkler
7. Chemical Weathering
Abstract
The decay of rock and stone has been well known to architects and conservators of historical buildings and monuments since the days of the Roman architect Vitruvius. We understand most phases of physical and chemical weathering as the result of minerals and rocks attempting to reach equilibrium under conditions at the earth’s surface. Much less is known, however, of the time required for these processes to take place in the complex environment of the earth’s surface. The following summarizes the present knowledge of weathering processes and rates.
Erhard M. Winkler
8. Stone Decay by Plants and Animals
Abstract
Plants and animals attack stone by both mechanical and chemical action. Higher plants can affect stone both mechanically and biochemically; bacteria, the lowest kind of life, only attack by chemical means. The biotic decay is very complex and not yet fully understood.
Erhard M. Winkler
9. Iron in Minerals and the Formation of Rust in Stone
Abstract
The mean iron content of the earth’s crust is 5%. Iron is locked in ferromagnesian silicates in rocks at the earth’s surface mostly as green or black ferrous-ferric iron. The black ferrous-ferric form is magnetite, the red ferric oxide, hematite, and the yellow-brass ferrous sulfides are commonly cubic pyrite and orthorhombic spearhead-shaped marcasite. Iron also appears as white to dark brown ferrous carbonate (siderite) and green iron silicate, glauconite, which adds a greenish color to sedimentary rocks (Sect. 4.4).
Erhard M. Winkler
10. Fire Resistance of Minerals and Rocks
Abstract
Urban fires have severely damaged stone in the past. Most affected are granites, quartz sandstones, limestones, dolostones, and marbles. Major conflagrations in many European cities during World War II left numerous ruins for the study of damage to stone. The behavior of minerals and rocks at high temperatures principally resembles solar heating-cooling cycles of rock and stone; these can lead to cracking and warping of thin stone panels. These are relatively slow processes compared with the spontaneous heating in major fires (Sect. 2.11). Uneven volume (linear) expansion of minerals may cause the disruption of stone and concrete during a fire. All minerals expand when heated.
Erhard M. Winkler
11. Frost Action on Stone
Abstract
Frost action on stone and concrete in moderate humid climates has long been known as a disruptive factor which deserves close attention. Frost action results from a combination of factors, such as volumetric expansion from the water to the ice phase, the degree of water saturation of the pore system, the critical pore size distribution, and the continuity of the pore system (see Sect. 6.3). The present accuracy of measurement of the pore size distribution has improved the prediction of durability. In the field, the cause of damage to stone overlaps other powerful agents, like salt action and the disruptive action of pure water below 0 °C.
Erhard M. Winkler
12. Silicosis
Abstract
Dust from mining and quarrying, as well as natural dust from dust storms and volcanic eruptions, has plagued man for many years. While the mineral components of such dust can vary to a large extent, industrial dust is usually limited to the mined product which is cut and ground in quarries and mills. Natural dusts are usually composed of clay minerals, calcite, and quartz. In contrast, industrial dusts are limited to the mined products. Dusts from coal, asbestos, calcite, and quartz have caused health problems in the past. Dust in the stone industry is usually limited to calcite and silica. While calcite dust from limestone, dolomite, and marble is fully removable from the lungs, silica dust is absorbed by the lungs and can lead to silicosis.
Erhard M. Winkler
13. Stone Conservation on Buildings and Monuments
Abstract
The rapid decay and disfiguring of stone monuments in urban and desert rural areas has challenged conservators to protect stone surfaces from premature or further decay. The attempt is made to halt the natural process of stone decay and possibly restore the original strength lost by chemical weathering, especially by the loss of binding cement. A general solution is not possible because the physical and chemical characteristics of an unlimited variety of stone types must be considered. The number of failures in stone preservation and attempts of restoration are greater than the number of cures.
Erhard M. Winkler
Backmatter
Metadaten
Titel
Stone in Architecture
verfasst von
Prof. Dr. Erhard M. Winkler
Copyright-Jahr
1997
Verlag
Springer Berlin Heidelberg
Electronic ISBN
978-3-662-10070-7
Print ISBN
978-3-662-10072-1
DOI
https://doi.org/10.1007/978-3-662-10070-7