It is difficult to imagine modern s

It is difficult to imagine modern structure without concrete. Concrete is the very building material which led to great structural innovations. The most important quality is its property to be formed into large and strong monolithic units. The basic materials for making concrete are cement, aggregate and water. Cement is the most essential material and the most important one for making concrete of high quality. Cement is made of limestone and clay. It is burnt at high temperature and ground up into powder. During the grinding a small percentage of raw gypsum is added otherwise it would set too quickly. Depending on the kind and composition of the raw materials different types of cement are obtained: Portland cement, blast furnace cement, rapid-hardening cement and many others.Concrete is made by binding together particles of sand and gravel, stone or broken brick. The binding agent used is a paste of Portland cement and water, in suitable proportions. When water is added to the cement, hydration takes place. This causes the whole mixture to set and harden, forming a solid mass. Cement starts hardening one hour after the water has been added and the process of hardening lasts for about twenty-eight days. The process is called concrete curing. The strength of concrete under favourable conditions increases with age. The strength of concrete is very rapid in the early stages, but continues more slowly for an indefinite period amounting to years. The sand, gravel (or broken stone) are termed “aggregate”; sand is known as “fine aggregate”, and gravel as “coarse aggregate”. Concrete can be made on a building site and poured into position as a wet mix, or it may be used as the materials for making prefabricated units in a plant.The characteristics of concrete depend upon the quality of the materials used, grading of the aggregates, proportioning and amount of water. The most important requirements for concrete are: it should be hard, strong, durable, fire-resistant and economical. To get the best of concrete the following considerations should be kept in mind (помнить):

Результаты (английский) 1:

It is difficult to imagine modern structure without concrete. Concrete is the very building material which led to great structural innovations. The most important quality is its property to be formed into large and strong monolithic units. The basic materials for making concrete are cement, aggregate and water. Cement is the most essential material and the most important one for making concrete of high quality. Cement is made of limestone and clay. It is burnt at high temperature and ground up into powder. During the grinding a small percentage of raw gypsum is added otherwise it would set too quickly. Depending on the kind and composition of the raw materials different types of cement are obtained: Portland cement, blast furnace cement, rapid-hardening cement and many others.

Concrete is made by binding together particles of sand and gravel, stone or broken brick. The binding agent used is a paste of Portland cement and water, in suitable proportions. When water is added to the cement, hydration takes place. This causes the whole mixture to set and harden, forming a solid mass. Cement starts hardening one hour after the water has been added and the process of hardening lasts for about twenty-eight days. The process is called concrete curing. The strength of concrete under favourable conditions increases with age. The strength of concrete is very rapid in the early stages, but continues more slowly for an indefinite period amounting to years. The sand, gravel (or broken stone) are termed “aggregate”; sand is known as “fine aggregate”, and gravel as “coarse aggregate”. Concrete can be made on a building site and poured into position as a wet mix, or it may be used as the materials for making prefabricated units in a plant.

The characteristics of concrete depend upon the quality of the materials used, grading of the aggregates, proportioning and amount of water. The most important requirements for concrete are: it should be hard, strong, durable, fire-resistant and economical. To get the best of concrete the following considerations should be kept in mind (remember):

Результаты (английский) 2:

It is difficult to imagine a modern structure without concrete. Concrete is the very building material that led to great structural innovations. The most important quality is its property to be formed into large and strong monolithic units. The basic materials for making concrete are cement, aggregate and water. Cement is the most essential material and the most important one for making concrete of high quality. Cement is made of limestone and clay. It is burnt at high temperature and ground up into powder. During the grinding a small percentage of raw gypsum is added otherwise it would set too quickly. Depending on the kind and composition of the raw materials different types of cement are obtained: Portland cement, blast furnace cement, rapid-hardening cement and many others.

Concrete is made by binding together particles of sand and gravel, stone or broken brick. The binding agent used is a paste of Portland cement and water, in suitable proportions. When water is added to the cement, hydration takes place. This causes the whole mixture to set and harden, forming a solid mass. Cement starts hardening one hour after the water has been added and the process of hardening lasts for about twenty-eight days. The process is called concrete curing. The strength of concrete under favorable conditions increases with age. The strength of concrete is very rapid in the early stages, but continues more slowly for an indefinite period amounting to years. The sand, gravel (or broken stone) are termed "aggregate"; sand is known as "fine aggregate," and gravel as "coarse aggregate." Concrete can be made on a building site and poured into position as a wet mix, or it may be used as the materials for making prefabricated units in a plant.

The characteristics of concrete depend upon the quality of the materials used, grading of the aggregates, proportioning and amount of water. The most important requirements for concrete are: it should be hard, strong, durable, fire-resistant and economical. To get the best of concrete the following considerations should be kept in mind (remember):

Результаты (английский) 3:

Это другое воображение современной структуры без заключения. Бетон-это тот самый строительный материал, который привел к большим конструктивным инновациям. Самое главное качество - это его свойство формироваться в крупные и прочные монолитные блоки. Основными материалами для изготовления бетона являются цемент,заполнитель и вода. 15.Цемент является наиболее существенным материалом и наиболее важным для изготовления бетона высокого качества. Цемент изготавливается из известняка и глины. Он горит при высоких температурах и поднимается в порошок. Сжигание небольшого процента сырого гипса добавляет другую надежду, что он будет установлен слишком быстро. В зависимости от вида и состава сырья получают различные виды цемента:портландцемент, доменный цемент furnas, быстротвердеющий цемент и многие другие.
Бетон сделан путем связывать совместно частицы песка и гравия, камня или сломленного кирпича. Связующее вещество используется в виде пасты из портландцемента и воды，в подходящих пропорциях. Когда вода добавляется к хозяину, происходит гидратация это связано с тем, что вся смесь устанавливается и твердеет, образуя твердый большой. 1.Цемент начинает твердеть через один час после добавления воды,и процесс затвердевания длится двадцать восемь дней. Этот процесс называется отверждением бетона. Прочность бетона при благоприятных условиях увеличивается с возрастом. Прочность бетона очень быстра на ранних стадиях,но продолжается более медленно в течение неопределенного периода, составляющего годы. Песок, гравий) (бетон может быть изготовлен на строительной площадке и вылит в положение в виде влажной смеси, или он может быть использован в качестве материалов для изготовления сборных блоков на заводе.
Характеристики бетона зависят от качества используемых материалов,сортировки заполнителей,дозирования и количества воды. Наиболее важными требованиями к бетону являются:он должен быть твердым,прочным,долговечным, огнестойким и экономичным. 6.To получить лучшее из конкретного следующие соображения следует иметь в виду).：