US 7,632,348 B2 · Lightweight concrete compositions containing antimicrobial agents

Abstract

A lightweight concrete composition containing from 10 to 90 volume percent of a cement composition, from 10 to 90 volume percent of particles having an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.03 g/cc to 0.64 g/cc, an aspect ratio of from 1 to 3, and from 0 to 50 volume percent of aggregate, where the particles contain an antimicrobial agent; where the sum of components used does not exceed 100 volume percent, and where after the lightweight concrete composition is set it has a compressive strength of at least 1700 psi as tested according to ASTM C39 after seven days. The concrete composition can be used to make concrete masonry units, construction panels, dining tables, counter surfaces, bench tops, and/or examination tables as well as other articles.

Claims14

Dependent claims

A lightweight concrete composition comprising

from 10 to 90 volume percent of a cement composition,
from 10 to 90 volume percent of expanded particles having an average particle diameter of from 0.2 mm to 3 mm, a bulk density of from 0.028 g/cc to 0.48 g/cc, an aspect ratio of from 1 to 3, and have a continuous outer layer,
from 0 to 50 volume percent of aggregate, and is substantially free of air-entraining agents;
wherein the sum of components used does not exceed 100 volume percent;
wherein the concrete composition has a density of from about 90 to about 130 lb./ft3;
wherein after the lightweight concrete composition is set for seven days, has a compressive strength of at least 1700 psi as tested according to ASTM C39;
and
wherein the expanded particles contain from 0.01 to 20 percent, based on the weight of the particles, of an antimicrobial agent.

5 more elements

A lightweight concrete composition consisting of:

from 10 to 60 volume percent of a cement composition that includes type III Portland Cement;
from 20 to 78 volume percent of expanded polymer particles having an average particle diameter of from 0.2 mm to 5 mm, a bulk density of from 0.032 g/cc to 0.56 g/cc, have a continuous outer layer, and an aspect ratio of from 1 to 2 and contain from 0.01 to 20 percent by weight of an antimicrobial agent;
from 5 to 35 volume percent of one or more aggregates,
from 0.1 to 1 volume percent of one or more additives selected from the group consisting of anti-foam agents, water-proofing agents, dispersing agents, set-accelerators, set-retarders, plasticizing agents, superplasticizing agents, freezing point decreasing agents, adhesiveness-improving agents, colorants and combinations thereof;
and
is substantially free of air-entraining agents;
and
wherein the sum of components used does not exceed 100 volume percent.

5 more elements

Dependencies are inferred from the claim text.

Lightweight concrete compositions containing antimicrobial agents

Life of this patent

Lightweight concrete compositions containing antimicrobial agents

Life of this patent

Abstract

Claims14