Lightweight Concrete—From Basics to Innovations
Lightweight concrete has a history of more than two-thousand years and its technical development is still proceeding. This review starts with a retrospective that gives an idea of the wide range of applications covered by lightweight concrete during the last century. Although lightweight concrete is well known and has proven its technical …
A Closer Look at Structural Lightweight Concrete
An all-lightweight concrete mixture that uses lightweight coarse aggregate and lightweight fine aggregate (no normal weight aggregate). All three types of lightweight aggregate met the standard materials …
Lightweight Cellular Concrete Properties and Geotechnical …
ABSTRACT. Lightweight Cellular Concrete (LCC) (also named as concrete or gas concrete) is a special construction material, which typically consists of Portland cement, water, and air voids created by a agent. This material has been increasingly used as a backfill material for geotechnical applications in recent years.
Recent advances in sustainable lightweight ed concrete
The density of the OPS concrete was maintained in the range of 1600–1700 kg/m 3, and the compressive strength was in the range of 16–24 MPa, satisfying the requirements of ASTM and ACI for structural lightweight concrete [175]. The increase in leads to more pores and crack paths, weakening the bonds between the OPS …
Guide to Lightweight Cellular Concrete for Geotechnical …
First, determine the absolute volume of the bucket to a known level. For example, fill it with exactly 5 gal (19 l) of water and mark the level. Then, adjust the mix design down to the ratio of the 5 gal (19 l) to that for 1 yd3 or 1 m3. Using this …
SAND LIGHTWEIGHT CONCRETE
Sand lightweight concrete is composed of portland cement, fine aggregate, lightweight coarse aggregate, water, and admixtures. Provide sand lightweight concrete that complies with the applicable requirements of Sections 420, 1000, and 1024 of the Standard Specifications and the additional requirements herein. Submit a mix design from a …
Lightweight aggregate concrete produced with crushed stone sand …
2. Materials and methods. LWA having a unit weight of 1536 kg/m 3 and limestone crushed aggregate having a maximum size of 19 mm, procured from a local aggregate crushing facility were used as LWA and NWA, respectively. Locally produced crushed stone sand having fineness modulus of 4.18 was used as fine aggregate.
Special Specification Template
1. 6–35 when sand equivalent value is greater than 85. 2. 0–6 for manufactured sand. MEASUREMENTANDPAYMENT3. 3.1. Measurement. This Item will be measured by the ton or cubic yard as defined in the plans and specifications. 3.2. Payment. Material (Pick up). Payment will be made at the unit prices bid for "Concrete Sand." This price is full
Experimental Study on Performance Influencing …
Based on the reasonable desert sand substitution rate, the technical indices, such as the bulk density, thermal conductivity, and slump, and the mechanical properties of the desert sand lightweight aggregate …
Standard Specification for Lightweight Aggregates for …
C 567 Test Method for Unit Weight of Structural Light-weight Concrete2 C 641 Test Method for Staining Materials in Lightweight Concrete Aggregates2 C 666 Test Method for Resistance of Concrete to Rapid ... 5.2.2 Natural Sand— Natural sand, when used to replace part, or all, of the lightweight-aggregate fines shall comply
A Closer Look at Structural Lightweight Concrete
All three types of lightweight aggregate met the standard materials specifications, AASHTO M 195, Standard Specification for Lightweight Aggregates for Structural Concrete, or ASTM C330, Standard …
Advantages Beyond Its Light Weight. Perlite Concrete …
lightweight concrete, utilizing perlite as the primary aggregate, which may be used as stated or as a starting point ... ˜e addition of sand to a perlite/cement mix will ... STANDARD SPECIFICATION for LIGHTWEIGHT AGGREGATES for INSULATING CONCRETE* U.S. SIEVE: #4 (4.75 mm) 100 #8 (2.36 mm) 85 to 100
SAND LIGHTWEIGHT CONCRETE
Sand lightweight concrete is composed of portland cement, fine aggregate, lightweight coarse aggregate, water, and admixtures. Provide sand lightweight concrete that …
LIGHTWEIGHT CONCRETE TECHNOLOGY AND …
Components of Cellular Concrete LIGHTWEIGHT CONCRETE TECHNOLOGY AND APPLICATION Type Usual Materials cement CEM I 32,5 R CEM I 42,5 R filler limestone flour fly ash aggregates sand 0 –2 mm 0 –4 mm agent SB 2 -Organic tenside stabilizer ST 3 -powder, (methyl cellulose)
Optimization of lightweight ed concrete using fly ash …
According to ACI M-318 [], the definition of lightweight concrete, a lightweight structural concrete is a concrete with more than 17 MPa strength on 28-days of curing.Also, according to it, the minimum compressive strength required for structural elements is 20 MPa. The main objectives of this paper are to evaluate compressive …
STANDARD SPECIFICATIONS
STANDARD SPECIFICATIONS (US CUSTOMARY UNITS) VOLUME 4 SECTION 700 CONSTRUCTION AND MATERIALS January 1, 2021 50 Wolf Road Albany, New York 12232
Lightweight concrete mix- Types, Preparation, Merit, and …
The water-cement ratio for such concrete is 0.5-0.4 with cement sand ratio 1: 2 and if the coarse aggregate is also added then 1:1:2.and aluminum content should be 0.05%- 0.08% of the concrete mass. 3) For light weight aggregate concrete (DESIGN MIX PROCEDURE) The above-formed concrete might not have the distinctive strength.
Lightweight concrete
The basic design for lightweight concrete is covered in Eurocode 2 Part 1-1, with section 11 having particular rules required for lightweight aggregate concretes. Concrete is considered to be lightweight is the density is not more than 2200kg/m 3 (the density of normal weight concrete is assumed to be between 2300kg/m 3 and 2400kg/m 3) and a ...
Chapter 4: Construction Details, Section 90: Concrete
Aggregates for concrete must conform to Section 90-1.02C "Aggregates," of the Standard Specifications unless specified otherwise. These requirements include durability and cleanness testing requirements for coarse aggregates, and organic impurities and sand equivalent testing requirements for fine aggregates.
Lightweight Aggregate Concrete
Weight. 20- 115 pounds per cubic foot. 130- 150 pounds per cubic foot. Compressive Strength. 7000+ psi. 8000 psi. Modulus of Elasticity. 65,000 psi for the ultra light weights to 3 million psi for the medium lightweight concretes. 2 - …
CONCRETE TECHNOLOGY Structural Lightweight …
The lowest density lightweight concrete uses lightweight aggregate for both fine and coarse aggregate fractions. However, most lightweight concrete mixtures contain normal weight …
FIRE RESISTANCE OF ESCS STRUCTURAL …
Table 2 presents the results of ESCSI's fire tests on 22 concrete slabs between 1960 and 1970. Except for the two prestressed concrete elements (Tests 5 and 6), all concretes listed in Table 2 were proportioned for a 3,000-psi specified compressive strength, with a 3- to 4-inch slump and approximately 6 percent entrained air.
Understanding Structural Lightweight Concrete
Understanding Structural Lightweight Concrete. Structural lightweight concrete is defined as having a 28 day compressive strength in excess of 2,500 psi and a unit weight ranging from 85 or 90 pcf to 115 pcf. Generally speaking, concrete in this range of strength and weight is produced with expanded shales, clays, slates, and slags.
Structural Lightweight Concrete
Expanded Shale, Clay, and Slate (ESCS) is a unique ceramic lightweight aggregate prepared by expanding select minerals in a rotary kiln at temperatures of 1000oC. Water: Shall meet ACI 318. Air-Entraining Admixtures: Shall meet ASTM C 260. Admixtures have demonstrated satisfactory performance with ESCS concretes.
CIP 36
Equilibrium density is a standardized value intended to represent the approximate density of the in-place concrete when it is in service. Project specifications should indicate the required equilibrium density of the lightweight concrete. Equilibrium density is defined in ASTM C 567, and can be calculated from the concrete mixture proportions.
Lightweight Cellular Concrete
Lightweight cellular concrete (LCC) is a mixture of portland or blended cement, water, and air created through a preformed ing agent. LCC can act as a lightweight, strong, durable, and inexpensive soil or fill replacement for geotechnical applications. LCC in the geotechnical environment can be used for multiple purposes including ...
Sustainable Structural Lightweight Concrete with Recycled …
This work presented a structural lightweight concrete (ACI 213-R) using only lightweight aggregates and mostly plastic waste aggregate, with a compressive strength of up to 17.6 MPa, a unit weight of 1282 kg/m 3, and an efficiency factor of 12.3 MPa·cm 3 /g. The study shows that with an optimum dosage, reusing plastic waste in …
ASTM C33
C331/C331MSpecification for Lightweight Aggregates for Concrete Masonry Units C332Specification for Lightweight Aggregates for Insulat-ing Concrete. 1 This specification is under the jurisdiction of ASTM CommitteeC09on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09 Aggregates.
Lightweight concrete
The 60-story Nations Bank Building in North Carolina, United States used presoaked expanded shale lightweight aggregate in 117 mm thick slabs that were supported on posttensioned concrete beams at 3.0 m centers. The lightweight concrete floor system was used to minimize dead weight and to achieve a 3-hour fire rating.
Cellular Lightweight Concrete Materials, Applications and Advantages
🕑 Reading time: 1 minuteCellular Lightweight Concrete (CLC) also known as ed concrete is one of the most significant type of concrete used for construction purposes due to its various advantages and usages over traditionally produced concrete. ed concrete is manufactured by mixing Portland cement, sand, fly ash, water and …
