Mortar composition containing iron oxide

Patent metadata

Field	Value
Publication number	US-2021380478-A1
Application number	US-202117405533-A
Country	US
Kind code	A1
Filing date	Aug 18, 2021
Priority date	Jul 25, 2019
Publication date	Dec 9, 2021
Grant date	—

Abstract

A mortar composition, which includes (i) a treated palm oil fuel ash, wherein the treated palm oil fuel ash is the only binder present, (ii) a fine aggregate, (iii) an alkali activator containing an aqueous solution of sodium hydroxide and sodium silicate, and (iv) aluminum hydroxide as a strength enhancer. A cured mortar made from the mortar composition is also disclosed with advantageous compressive strength properties.

First claim

1 . An iron oxide-containing mortar composition, comprising:
a treated palm oil fuel ash as a binder, wherein the treated palm oil fuel ash is the only binder present and has a median particle size (d 50 ) of 0.5 to 2.0 μm and contains Fe 2 O 3 in an amount of 3 to 7 wt. % based on the total weight of the treated palm oil fuel ash; a fine aggregate; an alkali activator comprising an aqueous solution of sodium hydroxide and sodium silicate; and aluminum hydroxide as a strength enhancer, wherein the aluminum hydroxide is the only strength enhancer present, and wherein a weight ratio of the aluminum hydroxide to the treated palm oil fuel ash is 0.01:1 to 0.05:1.

2 . The mortar composition of claim 1 , wherein the treated palm oil fuel ash is present in an amount of 20 to 30 wt. %, based on a total weight of the mortar composition.

3 . (canceled)

4 . (canceled)

5 . (canceled)

6 . The mortar composition of claim 1 , wherein the treated palm oil fuel ash comprises, as constituent oxides, 66 to 68 wt. % SiO 2 , 6 to 7 wt. % Al 2 O 3 , 5 to 6.5 wt. % Fe 2 O 3 , 5 to 6 wt. % CaO, 2.5 to 3.5 wt. % MgO, 4.5 to 6 wt. % K 2 O, 0.3 to 0.35 wt. % SO 3 , 0.18 to 0.2 wt. % Na 2 O, and 3 to 4 wt. % of P 2 O 3 , each based on a total weight of the treated palm oil fuel ash.

7 . (canceled)

8 . The mortar composition of claim 1 , wherein a weight ratio of the fine aggregate to the treated palm oil fuel ash is 1:1 to 2:1.

9 . (canceled)

10 . (canceled)

11 . (canceled)

12 . (canceled)

13 . (canceled)

14 . The mortar composition of claim 1 , wherein a weight ratio of the aluminum hydroxide to the treated palm oil fuel ash is 0.01:1 to 0.05:1.

15 . (canceled)

16 . The mortar composition of claim 1 , which has weight ratio of water to the treated palm oil fuel ash of 0.2 to 0.98.

17 . The mortar composition of claim 1 , which consists of the treated palm oil fuel ash, the fine aggregate, sodium hydroxide, sodium silicate, aluminum hydroxide, and water.

18 . (canceled)

19 . (canceled)

20 . (canceled)

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Salami Babatunde Abiodun
• Johari Megat Azmi Megat
• Maslehuddin Mohammed
• Ahmad Zainal Arifin

Classifications

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C04B18/087

  from liquid fuels, e.g. oil · CPC title

• C04B2111/00215

  Mortar or concrete mixtures defined by their oxide composition · CPC title

• C04B28/021 Primary

  Ash cements, e.g. fly ash cements (fly ash as filler C04B18/08); Cements based on incineration residues, e.g. alkali-activated slags from waste incineration (alkali-activated combustion residues as such C04B7/243; mixtures of the lime-pozzuolane type C04B28/18); Kiln dust cements · CPC title

• C04B18/02

  Agglomerated materials {, e.g. artificial aggregates} · CPC title