Magan Agarwal Binani Cement Limited Key factors that control the compatibility between Naphthalene-based super plasticizers and ordinary Portland cements Synopsis: Super plasticizers improve the workability of concrete at low water cement ratio but this workability is sometimes lost rapidly in the first hour after contact between the cement and water. This is especially the case for naphthalene-based and melamine-based superplasticizers when used with the so called incompatible cements. It
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day. Two major innovations were major factors in allowing romans to build these structures. Concrete‚ an invention of Rome‚ allowed them to build long lasting bridges‚ temples and dwellings. (Kamm‚ n.d.). Arches were used to extend the length of structures‚ providing support. With these two methods at their disposal‚ Rome was able to produce some awe inspiring structures. There were two types of concrete that were used in ancient Rome. The first of which was created simply using one part lime and
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need to take place with a behavioural therapist in order to ensure the child has their individual needs met. As a practitioner it is highly recommended that they should develop high standards of communication‚ as it is required in all aspects of working with children. Communicating with the child’s parents is very important‚ and because the parents are the child’s first educator/main carer‚ it is important that their wishes are met and understood. As part of skill to be able to communicate effectively
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Four Stages Stage 1 - Concrete Experience There’s an old proverb that says ‘experience is what you get after the fact’. Keep this in mind as you write your Concrete Experience because it is an experience you’ve had which you need to document. ‘Documenting’ is also used purposefully because it sums up the Stage 1 requirement. Stage 1 is the feeling stage. Aside from the fear this prompts for the rationalists amongst us the main difficulty with documenting the Concrete Experience is the need
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E1 From age 3-7 years children communication and language skills develop as they grew older. They start to ask questions and use large vocabulary. There will be some words that are to difficult for them to pronounce but they will still attempt it. They will start to communicate with other children and express their self in various ways. It will also be a long process for children at the age of 5-6 years because they will be learning new words and improving their skills. ‘This is a long process
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Aggregates for Concrete Aggregates are inert granular materials such as sand‚ gravel‚ or crushed stone that‚ along with water and cement‚ are an essential ingredient in concrete. Aggregates are the most mined materials in the world. For a good concrete mix‚ aggregates need to be clean‚ hard‚ strong particles free of absorbed chemicals or coatings of clay and other fine materials that could cause the deterioration of concrete. Aggregates‚ which account for 60 to 75 percent of the total volume
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only act as the insurance role‚ but also cannot disassemble the machine parts to achieve treatment failure；The discharge opening width can automatically adjust‚ easy operation and high reliability；The crushing chamber is designed by grain laminated principle‚ with the corresponding speed‚ so as to increase the production ratio and the processing capacity‚ and can increase levels of finished materials cube；Occurred in iron-passing and in an instant case of stuffy machine‚ the hydraulic device can automatic
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Plants‚ also called green plants (Viridiplantae in Latin)‚ are living organisms of the kingdom Plantae including such multicellular groups as flowering plants‚ conifers‚ ferns and mosses‚ as well as‚ depending on definition‚ the green algae‚ but not red or brown seaweeds like kelp‚ nor fungi or bacteria. Green plants have cell walls with cellulose and characteristically obtain most of their energy from sunlight via photosynthesis using chlorophyll contained in chloroplasts‚ which gives them their
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ABSTRACT Concrete has been the most preferred construction material for over five decades. It is being increasing day to day all over the world due to its versatility‚ mould ability‚ high compressive strength and many more advantages. For several years beginning in 1983‚ the problem of the durability of the concrete structures was a major topic of interest in Japan. The creation of durable concrete structures requires adequate compaction by skilled workers. One solution for the achievement of durable
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Refractory Concrete Tutorial - Recipe and Instructions Mixing heat resistant mortar without using a concrete mixer Heat resistant refractory concrete There are two ways‚ two types of heat resistant concretes that can be prepared. Cheaper and more expensive - stronger and weaker. The first one is a high heat refractory concrete. This type will survive in real high heat and can be used in hot-face (What is hot face? Hot face is a wall facing the main heat from a source. Internal walls‚ floor and
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