Fire Resistant Eco Concrete Blocks Containing Waste Glass

Patent metadata

Field	Value
Publication number	US-2019092685-A1
Application number	US-201715716488-A
Country	US
Kind code	A1
Filing date	Sep 26, 2017
Priority date	Sep 26, 2017
Publication date	Mar 28, 2019
Grant date	—

Abstract

A composition for forming fire resistant concrete block, that includes a cementitious binder material comprising alumina cement, recycled fine aggregate, and recycled coarse aggregates, the recycled fine aggregates including 10-50 wt % recycled particulate glass cullet having a particle size of 600 microns or less, a concrete block formed from the composition exhibiting a decrease in thermal conductivity with increasing temperature at temperatures causing the particulate glass cullet to melt. A concrete block fabricated from the composition exhibits a fire resistance of at least three hours, a density below 2000 kg/m3, and a compressive strength of at least 7 MPa.

First claim

1 . A composition for forming fire resistant concrete block, the composition comprising cementitious binder material including alumina cement, recycled fine aggregate, and recycled coarse aggregates, the recycled fine aggregates comprising 10-50 wt % recycled particulate glass cullet having a particle size of 600 microns or less, a concrete block formed from the composition exhibiting a decrease in thermal conductivity with increasing temperature at temperatures causing the particulate glass cullet to melt.

2 . The composition of claim 1 , wherein the cementitious binding material is in a weight percentage from 5% to 15% of the total composition, and comprises 50-90 wt % ordinary Portland cement and 10-50 wt % alumina cement.

3 . The composition of claim 1 , wherein the cementitious binding material further includes one or more additives selected from fly ash, GGBS, or silica fume in an amount from 10-50 wt %.

4 . The composition of claim 1 , further comprising water in a weight percentage from 5% to 10%.

5 . The composition of claim 1 , wherein the recycled fine aggregates and the recycled coarse aggregates are in a weight percentage from 70-90 wt %.

6 . The composition of claim 1 , wherein the mass ratio of fine to coarse aggregate is in a range of 1 to 5.

7 . The composition of claim 1 , wherein concrete blocks formed from the composition have a density below 2000 kg/m 3 , a compressive strength not below 7 MPa and a fire resistance period of at least 3 hours.

8 . Fire resistant concrete blocks made from the composition of claim 1 .

9 . A fire resistant concrete block including at least 70 wt % recycled starting materials, having a compressive strength of at least 7 MPa comprising a cementitious binder material including alumina cement, recycled fine aggregate, and recycled coarse aggregates, the recycled fine aggregates comprising 10-50 wt % recycled particulate glass cullet having a particle size of 600 microns or less, the concrete block exhibiting a decrease in thermal conductivity with increasing temperature at temperatures causing the particulate glass cullet to melt.

10 . The fire resistant concrete block of claim 9 , wherein the cementitious binding material is in a weight percentage from 5% to 15% of the total composition, and comprises 50-90 wt % ordinary Portland cement and 10-50 wt % alumina cement.

11 . The fire resistant concrete block of claim 9 , wherein the cementitious binding material further includes one or more additives selected from fly ash, GGBS, or silica fume in an amount from 10-50 wt %.

12 . The fire resistant concrete block of claim 9 , further comprising water in a weight percentage from 5% to 10%.

13 . The fire resistant concrete block of claim 9 , wherein the mass ratio of fine to coarse aggregate is in a range of 1 to 5.

14 . The fire resistant concrete block of claim 9 , wherein concrete blocks formed from the composition have a density below 2000 kg/m 3 and a fire resistance period of at least 3 hours.

Assignees

• Nano & Advanced Materials Inst Ltd

Inventors

• Chen Binmeng
• Zhu Honggang
• Sham Man Lung
• Yan Yifei
• Li Bo

Classifications

• C04B2111/28

  Fire resistance, i.e. materials resistant to accidental fires or high temperatures · CPC title

• C04B35/6303

  Inorganic additives · CPC title

• C04B2201/30

  for heat transfer properties such as thermal insulation values, e.g. R-values · CPC title

• C04B2201/20

  for the density · CPC title

• C04B35/66 Primary

  Monolithic refractories or refractory mortars, including those whether or not containing clay {(making or repairing of linings F27D1/16)} · CPC title