solar reflectance values of concrete cement

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Solar Reflectance Values of Concrete - America's Cement ...

The lowest solar reflectance for the studied mixtures of 0.34 was produced by one mixture containing a dark gray fly ash (FOG) and one mixture containing one of the darker cements (CXB). This solar reflectance value results in an 5Rl of about 37. All of the concrete mixtures studied in this report, regardless of constituents, would

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Concrete as Solar Reflectance Material - America's Cement ...

Concrete does a very good job of reflecting solar energy. That is the finding from a Portland Cement Association (PCA) study which measured the solar reflectance index (SRI) of 45 concrete mixes. Lighter colored materials (such as concrete) generally have a higher solar reflectance. They reflect heat from the sun and do not warm the air very much.

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[PDF] Solar Reflectance Values for Concrete Semantic Scholar

Semantic Scholar extracted view of "Solar Reflectance Values for Concrete" by M. Marceau et al.

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Solar Reflectance of Concretes for LEED Sustainable Sites ...

pavement, portland cements, roof, solar reflectance, reflectivity, slag cements, sustainable construction, urban heat island ABSTRACT This report presents the results of solar reflectance testing on 135 concrete specimens from 45 concrete mixes, representing a broad range of concretes. This testing determined which

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Solar Reflectance Index (SRI) values for colored concrete

with a Solar Reflective Index (SRI) of at least 29 when measured according to ASTM E903 or ASTM C1549. The actual SRI value of the concrete or structure made with Davis Colors can vary significantly from these values. The SRI value depends on the lightness or darkness of the surface as well as its reflectivity and light scattering properties.

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Solar Reflectance Values Of Concrete Cement

Solar Reflectance Values Of Concrete - America\'s Cement. The LEED-NC Reference Guide 7 provides a default emittance of 0.9 for concrete and solar reflectance values of 0.35 for \"new typical gray concrete\" and 0.7 for \"new typical white concrete.\" It also reports default SRI values for new gray and new white concrete of 35 and ,

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Concrete Technology Solar Reflectance Portland Cement ...

Solar Reflectance Values of Concrete - The Portland Cement emittance of 0.9 for concrete and solar reflectance values of 0.35 for .... floor treatment products and the latest resin diamond technologies to create a system ... sn2982a-solar-reflectance-values-of-concrete.pdf

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Moist curing increases the solar reflectance of concrete ...

10-08-2019  Increasing the solar reflectance, or said the albedo, of surfaces of buildings and streets would curtail the convection of heat from these surfaces to the air and thereby would mitigate the urban heat island effect [5], [6], [7]. Concrete mainly composes of aggregates, cement hydration productions, and sands. The albedo of a concrete sample is ...

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Effects of Composition and Exposure On the Solar ...

On the Solar Reflectance Of Portland Cement Concrete Ronnen Levinson and Hashem Akbari Heat Island Group Environmental Energy Technologies Division Lawrence Berkeley National Laboratory University of California Berkeley, CA 94720 Abstract Increasing the solar reflectance (albedo) of a paved surface keeps it cooler in the sun, reducing con-

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Solar Reflectance Values for Concrete - Martha VanGeem

reflectance. The average solar reflectance measurements for each mixture are shown in Table 1. Observations The lowest solar reflectance for the studied mixtures of 0.34 was produced by one mixture containing a dark gray fly ash (FDG) and one mixture containing one of the darker cements (CXB). This solar reflectance value results in an SRI of ...

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[PDF] Solar Reflectance Values for Concrete Semantic Scholar

Semantic Scholar extracted view of "Solar Reflectance Values for Concrete" by M. Marceau et al.

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Figure 5 from Solar Reflectance Values for Concrete ...

Fig. 5: Effect of solar reflectance of the supplementary cementitious material on the solar reflectance of the concrete mixture. All mixtures contained CS cement, AE fine aggregate, and CP coarse aggregate. Data points for mixture containing no SCM are provided for reference - "Solar Reflectance Values for Concrete"

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Pavements made of concrete with high solar reflectance ...

01-01-2015  Although concrete starts out with a relatively high solar reflectance and may not be as prevalent as asphalt in pavements, it is still a worthwhile endeavor to attempt to increase the solar reflectance even further since research studies indicate that even a small increase of 0.01 in albedo can have significant environmental benefits (Akbari et al., 2012).

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Effects of Composition and Exposure On the Solar ...

On the Solar Reflectance Of Portland Cement Concrete Ronnen Levinson and Hashem Akbari Heat Island Group Environmental Energy Technologies Division Lawrence Berkeley National Laboratory University of California Berkeley, CA 94720 Abstract Increasing the solar reflectance (albedo) of a paved surface keeps it cooler in the sun, reducing con-

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Effects of composition and exposure on the solar ...

01-11-2002  However, concrete reflectance did not increase with sand reflectance when the concrete made with the less reflective sand was frosted. Also, the influence of component albedo on smooth concrete albedo was not proportional to component mass fraction. 4.2. Reflectance as an indicator of cement and concrete chemistry

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Mix Design and Benefit Evaluation of High Solar ...

The production of high solar reflectance concrete consumes 43.5% less energy and results ... Keywords: concrete; cement based ... It has been observed that the solar reflection index values, ...

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Effects of composition and exposure on the solar ...

Concrete albedo generally correlated with cement albedo and sand albedo and, after abrasion, with rock albedo. Cement albedo had a disproportionately strong influence on the reflectance of concrete. Simulated weathering, soiling, and abrasion each reduced average concrete albedo, though some samples became slightly more reflective through weathering or soiling.

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Concrete curing compound for solar reflectance ...

MasterKure 107- A water based concrete curing compound, white pigmented for solar reflectance How does MasterKure 107 curing agent work? Master Builders Solutions 's MasterKure 107 is a solvent free, membrane forming wax emulsion, suitable for spray application to freshly poured concrete.. The resultant film retains sufficient moisture in the concrete to ensure full hydration of the cement ...

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Solar Reflectivity (R) Solar Reflectance Index (SRI) by ...

Solar Reflectivity (R) Solar Reflectance Index (SRI) by Color. Solar reflectivity or reflectance is the ability of a material to reflect solar energy from its surface back into the atmosphere. The SR value is a number from 0 to 1.0. A value of 0 indicates that the material absorbs all solar energy and a value of 1.0 indicates total reflectance.

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Solar Reflectance Values for Concrete - Martha VanGeem

reflectance. The average solar reflectance measurements for each mixture are shown in Table 1. Observations The lowest solar reflectance for the studied mixtures of 0.34 was produced by one mixture containing a dark gray fly ash (FDG) and one mixture containing one of the darker cements (CXB). This solar reflectance value results in an SRI of ...

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Solar Reflectance Index (SRI) of Concrete CPI-Worldwide

12-09-2015  Solar Reflectance Index (SRI) of Concrete Optical Characterisation of Concrete for Heat Island Mitigation With the aim of reducing the cooling energy demand of buildings and limiting the urban heat island effect, the optical properties of building materials such as roofing and pavers are taken into account in the U.S. American LEED® Green Building Rating Systems.

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Figure 2 from Solar Reflectance Values for Concrete ...

Fig. 2: Aggregates used in the current study: (a) fine aggregates; and (b) coarse aggregates. Numbers on each fine aggregate sample indicate the solar reflectance of the material - "Solar Reflectance Values for Concrete"

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Pavements made of concrete with high solar reflectance ...

01-01-2015  Although concrete starts out with a relatively high solar reflectance and may not be as prevalent as asphalt in pavements, it is still a worthwhile endeavor to attempt to increase the solar reflectance even further since research studies indicate that even a small increase of 0.01 in albedo can have significant environmental benefits (Akbari et al., 2012).

Get price

Effects of composition and exposure on the solar ...

01-11-2002  However, concrete reflectance did not increase with sand reflectance when the concrete made with the less reflective sand was frosted. Also, the influence of component albedo on smooth concrete albedo was not proportional to component mass fraction. 4.2. Reflectance as an indicator of cement and concrete chemistry

Get price

Effects of composition and exposure on the solar ...

21-12-2001  @article{osti_820773, title = {Effects of composition and exposure on the solar reflectance of Portland cement concrete}, author = {Levinson, Ronnen and Akbari, Hashem}, abstractNote = {Increasing the solar reflectance (albedo) of a paved surface keeps it cooler in the sun, reducing convection of heat from pavement to air and thereby decreasing the ambient air temperature.

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Mix Design and Benefit Evaluation of High Solar ...

The production of high solar reflectance concrete consumes 43.5% less energy and results ... Keywords: concrete; cement based ... It has been observed that the solar reflection index values, ...

Get price

Effects of composition and exposure on the solar ...

Concrete albedo generally correlated with cement albedo and sand albedo and, after abrasion, with rock albedo. Cement albedo had a disproportionately strong influence on the reflectance of concrete. Simulated weathering, soiling, and abrasion each reduced average concrete albedo, though some samples became slightly more reflective through weathering or soiling.

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Solar Reflectance - an overview ScienceDirect Topics

01-08-2014  The order of solar reflectance is as follows: spherulites of β-crystal form>small spherulites of α-crystal form>large spherulites of α-crystal form>disordered polymeric chain. 1 Sorbitol gave compositions with the highest reflectance values. 1. A solar heat responsive roofing material includes a continuous phase and dispersed discontinuous ...

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Solar Reflectivity (R) Solar Reflectance Index (SRI) by ...

Solar Reflectivity (R) Solar Reflectance Index (SRI) by Color. Solar reflectivity or reflectance is the ability of a material to reflect solar energy from its surface back into the atmosphere. The SR value is a number from 0 to 1.0. A value of 0 indicates that the material absorbs all solar energy and a value of 1.0 indicates total reflectance.

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