• How to Color Cement | DoItYourself.com

    Oct 07, 2009· There are two primary methods used to color cement. One is a dry pigment that is swept across the surface of freshly finished concrete, and the other is uses powder or liquid pigments that are mixed into the wet concrete before it is poured. The first method is quite easy to do but has the disadvantage of being easily chipped.

  • Types of Piles: Their Characteristics and General Use

    of concrete piles were devised. These early concrete piles were the cast-in-place type. Further development of the concrete pile led to the precast pile and, relatively recently, to the prestressed concrete pile. The need for extremely long piles with high bearing capacity led to the use of concrete-filled steel-pipe piles about 50 to 60 years ago.

  • (PDF) Electrical Resistivity of Concrete

    Although resistivity is an indirect method to assess concrete's pore connectivity, it can be used to estimate the potential service life of reinforced concrete structures and to develop limiting ...

  • How Concrete is Made - Portland Cement Association

    How Concrete is Made. In its simplest form, concrete is a mixture of paste and aggregates, or rocks. The paste, composed of portland cement and water, coats the surface of the fine (small) and coarse (larger) aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.

  • Can You Pour Concrete Over Existing Concrete - The Honest ...

    Newly poured concrete will stick to old concrete if you use a bonding agent called Weld-Crete. Weld-Crete is a "glue like" bonding agent designed specifically to bond new concrete to old concrete. My rule of thumb is: If your new concrete is less than 3 inches thick, then you want to make sure it sticks (or bonds) to the old concrete.

  • Sustainable Concrete Construction - Methods and Practices

    The demolition of concrete structure could be an expensive process. Methods for Achieving Sustainable Concrete Construction Following are the methods for achieving sustainable concrete construction: Use of Blended cements: Most of CO2 is being released during clinker production due to calcium calcinations and energy consumption.

  • Concrete Mix Design - sginstitute.in

    American Concrete Institute Method of Mix Design (ACI–211.1) This method of proportioning was first published in 1944 by ACI committee 613. In 1954 the method was revised to include, among other modifications, the use of entrained air. In 1970, the method of mix design became the responsibility of ACI committee 211.

  • How to Pour Concrete in Hot Weather

    Jul 22, 2019· When placing concrete for a slab, first dampen the subgrade. Use cool water to dampen side forms for slabs or walls. Do not begin finishing concrete while water is still on the surface. Implement the correct curing method to allow the concrete to set uniformly. Be ready to receive and place concrete.

  • Current Methods for the Utilization of the Fresh Concrete ...

    Dec 31, 2015· Abstract. World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium, WMCAUS 2016 -- 13 June 2016 through 17 June 2016 -- -- 132600As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study.

  • How to Solve Common Concrete Problems in Construction

    Nov 20, 2019· How to avoid crazed concrete: Cure the concrete in a timely manner. Use a moderate slump concrete without bleeding and segregation. Do not finish concrete until all water has evaporated. Do not dust dry cement on the surface while water is present. Do not sprinkle water over the concrete …

  • Current Methods for the Utilization of the Fresh Concrete ...

    As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study. Toward this aim, an in-depth literature review was performed as a

  • CONCRETE BASICS A Guide to Concrete Practice

    Concrete Basicsaims to provide a clear, concise explanation of all aspects of making quality concrete; from the Materials and Properties involved through Planning, Preparation, Finishing and Curing. Concrete Basicsaddresses the needs of unskilled and semi-skilled persons undertaking general concreting projects including home and handyman projects.

  • 12 Most Common Mistakes When Pouring Concrete | The Family ...

    Sep 04, 2020· The standard concrete recipe is one part cement, two parts sand and three parts clean crushed stone. Don't skimp. Crushed stone is filler, so don't use any more than the recipe calls for. In fact, use a little less stone proportionally if you have a hard time troweling a nice, smooth surface.

  • Standard Test Method for Time of Setting of Concrete ...

    5.3 This test method may also be applied to prepared mortars and grouts. However, when the setting time of concrete is desired, the test shall be performed on mortar sieved from the concrete mixture and not on a prepared mortar intended to simulate the mortar fraction of the concrete; it has been shown that the initial and final setting times may be increased when using the prepared mortar.

  • The History of Concrete - InterNACHI®

    In 1891, George Bartholomew poured the first concrete street in the U.S., and it still exists today. The concrete used for this street tested at about 8,000 psi, which is about twice the strength of modern concrete used in residential construction. Court Street in Bellefontaine, Ohio, which is the oldest concrete street in the U.S.

  • Water management: Current and future challenges and ...

    Jun 20, 2015· The third United Nations World Water Development Report [United Nations World Water Assessment Programme (UN WWAP), 2009] warns, in an unprecedented fashion, that extremely serious consequences may result from the current inequitable, unsustainable use of water. Both economic development and security are placed at risk by poor water management.

  • Spraying Water on New Concrete - Watering Concrete ...

    Spraying water on your new concrete is one of the best and oldest ways to cure your concrete. After new concrete is poured and finished the concrete begins its curing process. The best cured concrete is concrete that is cured slowly, uniformly, and evenly from top to bottom. During the summer months, the outside temperature can become hot.

  • A survey on problems encountered in current concrete ...

    Jun 01, 2018· the current approaches taken to address damage in concrete and their impact. The market research survey was also used to explore the potential applications of self-healing cementitious materials and the benefits in their use, the findings of which will be used to inform future developments in this research area.

  • Curing Concrete - How Long it Takes & How To Cure - The ...

    CURING METHODS. Water cure: The concrete is flooded, ponded, or mist sprayed. This is the most effective curing method for preventing mix water evaporation. Water retaining methods: Use coverings such as sand, canvas, burlap, or straw that are kept continuously wet. The material used must be kept damp during the curing period.

  • Methods of Curing Concrete - Curing types and Techniques ...

    Mar 18, 2017· Such methods provide some cooling through evaporation, which is beneficial in hot weather. b. Ponding c. Spraying or Fogging d. Wet Covering Prevent the loss of the existing water. Prevent the loss of the mixing water from concrete by sealing its surface. This can be done by: Covering the concrete with impervious paper or plastic sheets.

  • Current Methods for the Utilization of the Fresh Concrete ...

    Jan 01, 2016· As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study. Toward this aim, an in-depth literature review was performed as a methodological approach.

  • ASTM C172 - Sampling Fresh Concrete and Oral Exam | SI Certs

    Sampling Fresh Concrete. This method of testing can be used on any type of concrete–lightweight, regular weight or heavy weight. Sieve aggregate that would be retained on a 1-1/2" sieve over a 1" sieve. Sampling, according to ASTM standards, must be done in intervals from the middle portion of the batch of concrete.

  • Properties of Concrete - Workability, Setting, Bleeding ...

    Mar 19, 2017· Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state. This is also called "Green Concrete". Another term used to describe the state of fresh concrete is consistence, which is the ease with which concrete will flow. The transition process of changing of concrete from plastic state to hardened state.

  • Plastic wastes to construction products: Status ...

    Jun 01, 2020· Hama and Hilal studied the fresh properties of self-consolidating concrete (SCC) incorporating plastic wastes as fine aggregate. The study concluded that the addition of plastic to SCC, at 12.5% by weight of fine aggregate, improved its fresh properties, such as passing ability and filling ability.

  • Methods of Curing Concrete - Curing types and Techniques ...

    Mar 18, 2017· Such methods provide some cooling through evaporation, which is beneficial in hot weather. b. Ponding c. Spraying or Fogging d. Wet Covering Prevent the loss of the existing water. Prevent the loss of the mixing water from concrete by sealing its surface. This can be done by: Covering the concrete …

  • 6 Ways to Test Concrete Strength Measurement and 1 You May ...

    Jun 11, 2021· The most common method for monitoring the strength of in-situ concrete is the use of field-cured cylinders. This practice has remained generally unchanged since the early 19 th century.These samples are casted and cured according to ASTM C31 and tested for compressive strength by a third-party lab at various stages.

  • CONCRETE PAVEMENT GUIDE - Caltrans

    The Concrete Pavement Guide (CPG) provides a comprehensive overview of current new construction-reconstruction, preservation, and rehabilitation strategies used by the Department for concrete pavement. The information in this guide applies to all concrete pavement and composite pavement that was not previously cracked and seated.

  • Current Methods for the Utilization of the Fresh Concrete ...

    As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study.

  • How to Color Cement | DoItYourself.com

    Oct 07, 2009· There are two primary methods used to color cement. One is a dry pigment that is swept across the surface of freshly finished concrete, and the other is uses powder or liquid pigments that are mixed into the wet concrete before it is poured. The first method is quite easy to do but has the disadvantage of being easily chipped.

  • Types of Piles: Their Characteristics and General Use

    of concrete piles were devised. These early concrete piles were the cast-in-place type. Further development of the concrete pile led to the precast pile and, relatively recently, to the prestressed concrete pile. The need for extremely long piles with high bearing capacity led to the use of concrete-filled steel-pipe piles about 50 to 60 years ago.

  • (PDF) Electrical Resistivity of Concrete

    Although resistivity is an indirect method to assess concrete's pore connectivity, it can be used to estimate the potential service life of reinforced concrete structures and to develop limiting ...

  • How Concrete is Made - Portland Cement Association

    How Concrete is Made. In its simplest form, concrete is a mixture of paste and aggregates, or rocks. The paste, composed of portland cement and water, coats the surface of the fine (small) and coarse (larger) aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.

  • Can You Pour Concrete Over Existing Concrete - The Honest ...

    Newly poured concrete will stick to old concrete if you use a bonding agent called Weld-Crete. Weld-Crete is a "glue like" bonding agent designed specifically to bond new concrete to old concrete. My rule of thumb is: If your new concrete is less than 3 inches thick, then you want to make sure it sticks (or bonds) to the old concrete.

  • Sustainable Concrete Construction - Methods and Practices

    The demolition of concrete structure could be an expensive process. Methods for Achieving Sustainable Concrete Construction Following are the methods for achieving sustainable concrete construction: Use of Blended cements: Most of CO2 is being released during clinker production due to calcium calcinations and energy consumption.

  • Concrete Mix Design - sginstitute.in

    American Concrete Institute Method of Mix Design (ACI–211.1) This method of proportioning was first published in 1944 by ACI committee 613. In 1954 the method was revised to include, among other modifications, the use of entrained air. In 1970, the method of mix design became the responsibility of ACI committee 211.

  • How to Pour Concrete in Hot Weather

    Jul 22, 2019· When placing concrete for a slab, first dampen the subgrade. Use cool water to dampen side forms for slabs or walls. Do not begin finishing concrete while water is still on the surface. Implement the correct curing method to allow the concrete to set uniformly. Be ready to receive and place concrete.

  • Current Methods for the Utilization of the Fresh Concrete ...

    Dec 31, 2015· Abstract. World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium, WMCAUS 2016 -- 13 June 2016 through 17 June 2016 -- -- 132600As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study.

  • How to Solve Common Concrete Problems in Construction

    Nov 20, 2019· How to avoid crazed concrete: Cure the concrete in a timely manner. Use a moderate slump concrete without bleeding and segregation. Do not finish concrete until all water has evaporated. Do not dust dry cement on the surface while water is present. Do not sprinkle water over the concrete …

  • Current Methods for the Utilization of the Fresh Concrete ...

    As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study. Toward this aim, an in-depth literature review was performed as a

  • CONCRETE BASICS A Guide to Concrete Practice

    Concrete Basicsaims to provide a clear, concise explanation of all aspects of making quality concrete; from the Materials and Properties involved through Planning, Preparation, Finishing and Curing. Concrete Basicsaddresses the needs of unskilled and semi-skilled persons undertaking general concreting projects including home and handyman projects.

  • 12 Most Common Mistakes When Pouring Concrete | The Family ...

    Sep 04, 2020· The standard concrete recipe is one part cement, two parts sand and three parts clean crushed stone. Don't skimp. Crushed stone is filler, so don't use any more than the recipe calls for. In fact, use a little less stone proportionally if you have a hard time troweling a nice, smooth surface.

  • Standard Test Method for Time of Setting of Concrete ...

    5.3 This test method may also be applied to prepared mortars and grouts. However, when the setting time of concrete is desired, the test shall be performed on mortar sieved from the concrete mixture and not on a prepared mortar intended to simulate the mortar fraction of the concrete; it has been shown that the initial and final setting times may be increased when using the prepared mortar.

  • The History of Concrete - InterNACHI®

    In 1891, George Bartholomew poured the first concrete street in the U.S., and it still exists today. The concrete used for this street tested at about 8,000 psi, which is about twice the strength of modern concrete used in residential construction. Court Street in Bellefontaine, Ohio, which is the oldest concrete street in the U.S.

  • Water management: Current and future challenges and ...

    Jun 20, 2015· The third United Nations World Water Development Report [United Nations World Water Assessment Programme (UN WWAP), 2009] warns, in an unprecedented fashion, that extremely serious consequences may result from the current inequitable, unsustainable use of water. Both economic development and security are placed at risk by poor water management.

  • Spraying Water on New Concrete - Watering Concrete ...

    Spraying water on your new concrete is one of the best and oldest ways to cure your concrete. After new concrete is poured and finished the concrete begins its curing process. The best cured concrete is concrete that is cured slowly, uniformly, and evenly from top to bottom. During the summer months, the outside temperature can become hot.

  • A survey on problems encountered in current concrete ...

    Jun 01, 2018· the current approaches taken to address damage in concrete and their impact. The market research survey was also used to explore the potential applications of self-healing cementitious materials and the benefits in their use, the findings of which will be used to inform future developments in this research area.

  • Curing Concrete - How Long it Takes & How To Cure - The ...

    CURING METHODS. Water cure: The concrete is flooded, ponded, or mist sprayed. This is the most effective curing method for preventing mix water evaporation. Water retaining methods: Use coverings such as sand, canvas, burlap, or straw that are kept continuously wet. The material used must be kept damp during the curing period.

  • Methods of Curing Concrete - Curing types and Techniques ...

    Mar 18, 2017· Such methods provide some cooling through evaporation, which is beneficial in hot weather. b. Ponding c. Spraying or Fogging d. Wet Covering Prevent the loss of the existing water. Prevent the loss of the mixing water from concrete by sealing its surface. This can be done by: Covering the concrete with impervious paper or plastic sheets.

  • Current Methods for the Utilization of the Fresh Concrete ...

    Jan 01, 2016· As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study. Toward this aim, an in-depth literature review was performed as a methodological approach.

  • ASTM C172 - Sampling Fresh Concrete and Oral Exam | SI Certs

    Sampling Fresh Concrete. This method of testing can be used on any type of concrete–lightweight, regular weight or heavy weight. Sieve aggregate that would be retained on a 1-1/2" sieve over a 1" sieve. Sampling, according to ASTM standards, must be done in intervals from the middle portion of the batch of concrete.

  • Properties of Concrete - Workability, Setting, Bleeding ...

    Mar 19, 2017· Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state. This is also called "Green Concrete". Another term used to describe the state of fresh concrete is consistence, which is the ease with which concrete will flow. The transition process of changing of concrete from plastic state to hardened state.

  • Plastic wastes to construction products: Status ...

    Jun 01, 2020· Hama and Hilal studied the fresh properties of self-consolidating concrete (SCC) incorporating plastic wastes as fine aggregate. The study concluded that the addition of plastic to SCC, at 12.5% by weight of fine aggregate, improved its fresh properties, such as passing ability and filling ability.

  • Methods of Curing Concrete - Curing types and Techniques ...

    Mar 18, 2017· Such methods provide some cooling through evaporation, which is beneficial in hot weather. b. Ponding c. Spraying or Fogging d. Wet Covering Prevent the loss of the existing water. Prevent the loss of the mixing water from concrete by sealing its surface. This can be done by: Covering the concrete …

  • 6 Ways to Test Concrete Strength Measurement and 1 You May ...

    Jun 11, 2021· The most common method for monitoring the strength of in-situ concrete is the use of field-cured cylinders. This practice has remained generally unchanged since the early 19 th century.These samples are casted and cured according to ASTM C31 and tested for compressive strength by a third-party lab at various stages.

  • CONCRETE PAVEMENT GUIDE - Caltrans

    The Concrete Pavement Guide (CPG) provides a comprehensive overview of current new construction-reconstruction, preservation, and rehabilitation strategies used by the Department for concrete pavement. The information in this guide applies to all concrete pavement and composite pavement that was not previously cracked and seated.

  • Current Methods for the Utilization of the Fresh Concrete ...

    As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study.