# US 2019/0169070 A1 · Lightweight concrete composition containing perlite and resin beads

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0169070 A1
- Document ID: US20190169070A1
- Status: Published application
- Kind: A1
- Application number: 16/267,770
- Filed: 2019-02-05
- Published: 2019-06-06
- Earliest claimed: 2016-03-30
- Assignees: King Fahd University of Petroleum and Minerals
- Applicants: King Fahd University of Petroleum and Minerals
- Inventors: Mohammed MASLEHUDDIN; Salah U. AL-DULAIJAN; Mohammed Rizwan ALI
- Web page: https://patentgrep.com/patent/US20190169070A1

## CPC

- C04B 28/04: Portland cements
- C04B 28/006: {containing mineral polymers, e.g. geopolymers of the Davidovits type}
- C04B 28/065: {Calcium aluminosulfate cements, e.g. cements hydrating into ettringite}
- C04B 28/08: Slag cements
- C04B 28/10: Lime cements or magnesium oxide cements
- C04B 2111/28: Fire resistance, i.e. materials resistant to accidental fires or high temperatures
- C04B 2111/40: Porous or lightweight materials
- C04B 2201/32: for the thermal conductivity, e.g. K-factors
- Y02P 40/10: Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02W 30/91: Use of waste materials as fillers for mortars or concrete
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A structural lightweight concrete composition comprising cement, a fine aggregate such as sand, a natural coarse aggregates, such as limestone, scoria or perlite or mixtures thereof, a synthetic coarse aggregate comprising a polymeric material, such as polypropylene beads, an industrial waste byproduct in the form of fine particles, such as silica fume or heavy oil ash, a superplasticizer, such as a polycarboxylate ether and water demonstrating lower thermal conductivity and sufficient compressive strength. Concrete products made therefrom and methods for producing such products are also provided.

## Claims

### Claim 1

A lightweight concrete composition containing perlite and resin beads, comprising:
cement;
a fine aggregate;
a natural coarse aggregate comprising 10-25 wt % expanded perlite based on the weight of the natural coarse aggregate;
a spherical polymeric beads;
an industrial waste byproduct in the form of fine particles;
a superplasticizer; and
water;
wherein the average particle size of the fine aggregate and the industrial waste byproduct is less than or equal to 1 mm and the average particle size of the spherical polymeric beads and the natural coarse aggregate is greater than 1 mm;
wherein the weight ratio of water to cement is in the range of 0.33 to 0.8 and is sufficient to affect hydraulic setting of the cement; and
wherein the spherical polymeric beads have a specific gravity of 0.8-0.95.

### Claim 2 (depends on 1)

The structural lightweight concrete composition of claim 1, wherein the spherical polymeric beads are spherical polypropylene beads with an average particle size of 4-15 mm.

### Claim 3 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a weight percentage of the spherical polymeric beads ranging from 2-15% relative to the total weight of the composition.

### Claim 4 (depends on 1)

The structural lightweight concrete composition of claim 1, wherein the cement is present in the composition at 300-500 kg/m3.

### Claim 5 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a weight percentage of cement ranging from 20-30% relative to the total weight of the composition.

### Claim 6 (depends on 1)

The structural lightweight concrete composition of claim 1, wherein the fine aggregate is sand with an average particle size of less than 700 μm.

### Claim 7 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a weight percentage of the fine aggregate ranging from 15-30% relative to the total weight of the composition.

### Claim 8

(canceled)

### Claim 9 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a weight percentage of the natural coarse aggregate ranging from 20-45% relative to the total weight of the composition.

### Claim 10 (depends on 1)

The structural lightweight concrete composition of claim 1, wherein the natural coarse aggregate comprises crushed limestone having an average particle size in the range of 1-20 mm.

### Claim 11 (depends on 1)

The structural lightweight concrete composition of claim 1, wherein the industrial waste byproduct is at least one selected from the group consisting of silica fume a ad heavy oil ash.

### Claim 12 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a weight percentage of the industrial waste byproduct in the form of fine particles ranging from 0.5-10% relative to the total weight of the composition.

### Claim 13 (depends on 1)

The structural lightweight concrete composition of claim 1, wherein the superplasticizer is a polycarboxylate ether.

### Claim 14 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a weight percentage of the superplasticizer ranging from 0.1-2M % relative to the total weight of the composition.

### Claim 15 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a weight percentage of water ranging from 10-20% relative to the total weight of the composition.

### Claim 16 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a 28-day unit weight in the range of 1600-1900 kg/m3 after setting.

### Claim 17 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a compressive strength in the range of 20-26 MPa after setting.

### Claim 18 (depends on 1)

The structural lightweight concrete composition of claim 1, which has a thermal conductivity in the range of 0.3-0.7 W/(m·K) after setting.

### Claim at position 19

19-20. (canceled)