Установите последовательность предложений чтобы получился связный текст. The ancient Romans discover...: ответ на тест 1105257 - Английский язык

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The ancient Romans discovered a mineral on the slopes of Mount Vesuvius. The mineral when mixed with limestone and burned, produced cement, that hardened under water as well as in the air. 1_______. As time passed, the new material not only became the preferred type for use in all their buildings projects but changed the character of Roman construction. Masonry of stone or brick was used to construct only the surfaces of masonry piers and walls but the interiors were filled with large amounts of the new type of mortar.
We now know that mortar continued the main ingredient of modern Portland cement. 2_______. With the fall of the Roman Empire, knowledge of concrete construction was lost. 3_______. In 1824 an artificial cement, named Portland cement, was patented. 4_______.

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Cement is the most important component of concrete. 1_______. Concrete may be considered an artificial conglomerate of “crushed stone, gravel or similar inert material with a mortar”. A mortar is a mixture of sand, screenings or similar inert particles with cement and water. 2_______. The most accurate method of measuring proportions is to weigh the required quantities of each material. This may be done whether the proportions are based upon volumes or weights. 3_______. It is also widely used in large building constructions. 4_______.

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Windows were formerly made on the job site by highly skilled carpenters, but are now produced almost exclusively in factories. 1_______.Windows need to be made to a very high standard of precision if they are to operate easily and maintain a high degree of weather tightness over a period of many years. In cold climates especially, a loosely fitted window with single glass and a frame that is highly conductive of heat will significantly increase heating consumption for a building, cause noticeable discomfort to the people in the building, and create large quantities of condensate to stain and decay finish materials in and around the window.
2_______. Single-hung and double-hung windows have one or two moving sashes, which are the frames in which the glass is mounted. 3_______. A sliding window is essentially a single-hung window. 4_______.

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The plant where high-density polyethylene pipe is being manufactured needed repairs to its pipe storage area. The repairs became necessary because the stone layer did not shed water and it caused cracks. The cracking of the storage pavement area made it necessary to stabilize the site.
So it became necessary for engineers to look for a way that would be economical and would not require shutting down the operating area of the plant. After testing a number of alternatives, it was decided to use polypropylene fibres for the purpose. It was found out that when being mixed with soil the fibres produce the necessary stability. The way the engineers proposed turned out to be economical and quite successful.
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The repairs became necessary because …

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The fibre reinforced polymer bridge deck is a newly-invented arrangement. It is made up of composite materials. They are extremely useful since, because of their composition, they have a wide range of application. Compared with other conventional materials they can solve a much greater number of problems.
One of the advantages of the bridge deck is that it is highly resistant to corrosion and fatigue. The material it is made up of is very easy to transport; it also allows rapid installation using lighter equipment and much less manpower. Holes are easily cut in the deck. They can be closed out to accommodate the same drainage scuppers that are used on conventional decks.
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One of the advantages of the bridge deck is that it is highly resistant to …

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F. Hennebique was born in France, in the family of a farmer. Already in his childhood he became fond of natural sciences and spent his free time on reading books on natural sciences. At the age of 18 he became an apprentice of a builder and at the same time he continued his studies of theoretical technology. At the age of 25 years Hennebique specialized in restoring churches. He travelled all over the country visiting cathedrals and examining their architecture and construction.
As years passed by, he grew interested in railway works, including bridges and viaducts. In 1844 he designed a house for a client and, to prevent damage by fire, combined good-quality steel with concrete in compression. In this way he realized a new idea to put steel rods in the bottom of the slab in order to prevent any damage by fire. That building with its fire resistance guarantee was completed in 1880 and stood until destroyed during the First World War.
From that time on, F. Hennebique concentrated on the development and production of reinforced concrete constructions. One of his reinforced concrete buildings of that time, a single-storey structure in Paris, had a concrete and glass roof.
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F. Hennebique concentrated on the development and production of …