lignin concrete admixtures, lignin concrete admixtures
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lignin concrete admixtures, lignin concrete admixtures .

lignin based admixtures Topic - Concrete

2015-9-1  The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete

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WO1997013733A1 - Lignin-based concrete admixtures -

The invention provides for an admixture for reducing the water content of a concrete mix. The admixture comprises an alkaline solution of a lignin in a sulfomethylolated form. The admixture further comprises an air detrainer. Also provided are novel cement compositions comprising the admixture of the invention.

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Use of lignin-based products in concrete - ScienceDirect

1996-1-1  This chapter discusses the origin and the nature of lignin in detail. Because of the inherent structure and some intrinsic properties, lignin-based products find applications as binders, surface-active agents, and dispersants. The principal use of lignin-based products in concrete manufacture is as chemical admixtures.

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Lignin-Based Hybrid Admixtures and their Role in Cement ...

Analysis of lignin admixtures in cement mortar indicated a significant increase in compressive strength in the case of a 0.125% lignin admixture after 7 days (33.9 MPa); however, increasing the lignin content results in a slight decrease in the initial strength, reaching 25.1 MPa for 0.5% biopolymer admixture (see Figure 5b). The values for the ...

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Lignin-Based Hybrid Admixtures and their Role in Cement ...

In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e., kraft lignin and magnesium lignosulfonate, and alumina as an inorganic component. Al 2 O 3 -lignin and Al 2 O 3 -lign

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Lignin-Based Hybrid Admixtures and their Role in Cement ...

2019-9-30  PDF In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e.,... Find, read and cite all the research ...

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Lignin-Based Hybrid Admixtures and their Role in Cement ...

In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e., kraft lignin and magnesium lignosulfonate, and alumina as an inorganic component. Al2O3-lignin and Al2O3-lignosulfonate systems were prepared by a mechanical method using a mortar grinder and a planetary ball mill, which made it possible to obtain ...

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Admixtures for Concrete - Memphis

2021-8-9  admixtures usually retard the setting time of concrete by one to three hours (Fig. 6-5). Some water-reducing admix-tures may also entrain some air in concrete. Lignin-based admixtures can increase air contents by 1 to 2 percentage points. Concretes with water reducers generally have good air

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How can Lignin Help Improve Concrete Construction? -

2021-9-5  Lignin is a wood waste, which after necessary processing, can be used in the field of building materials and construction as a water-reducing admixture, set retarder, grinding agent in cement production, cement replacement materials, etc. It makes concrete stronger by increasing its compressive strength, and greener by reducing cement quantity ...

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Production of antibacterial cement composites containing ...

2021-9-10  The presence of lignin in the admixture, although it reduced the strength, in proportion to the increasing amount of the biopolymer in the system, made it possible to reduce the problem of dispersion of oxide admixtures in the cement matrix, as is confirmed by the compressive strength values for composites containing pristine ZnO and ZnO/lignin ...

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Lignin-Based Hybrid Admixtures and their Role in Cement ...

In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e., kraft lignin and magnesium lignosulfonate, and alumina as an inorganic component. Al 2 O 3 -lignin and Al 2 O 3 -lign

Get Price

Lignin-based concrete plasticizer technology EurekAlert!

The technology will be scaled-up, and the lignin-based concrete admixtures will be developed with industrial partners in the LigniOx project, a Bio-Based Industries Joint Undertaking project ...

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Lignin-Based Hybrid Admixtures and their Role in Cement ...

2019-9-30  PDF In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e.,... Find, read and cite all the research ...

Get Price

Lignin-Based Hybrid Admixtures and their Role in Cement ...

In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e., kraft lignin and magnesium lignosulfonate, and alumina as an inorganic component. Al2O3-lignin and Al2O3-lignosulfonate systems were prepared by a mechanical method using a mortar grinder and a planetary ball mill, which made it possible to obtain ...

Get Price

SULFOMETHYLOLATED LIGNIN-BASED CONCRETE

The invention provides for an admixture for reducing the water content of a concrete mix. The admixture comprises an alkaline solution of a lignin in a sulfomethylolated form. The sulfomethylolated lignin in the admixture can also be cross-linked with a cross-linking agent. The admixture further comprises an

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How can Lignin Help Improve Concrete Construction? -

2021-9-5  Lignin is a wood waste, which after necessary processing, can be used in the field of building materials and construction as a water-reducing admixture, set retarder, grinding agent in cement production, cement replacement materials, etc. It makes concrete stronger by increasing its compressive strength, and greener by reducing cement quantity ...

Get Price

Admixtures for Concrete - Memphis

2021-8-9  admixtures usually retard the setting time of concrete by one to three hours (Fig. 6-5). Some water-reducing admix-tures may also entrain some air in concrete. Lignin-based admixtures can increase air contents by 1 to 2 percentage points. Concretes with water reducers generally have good air

Get Price

Lignin supplier implements allocation ... - Concrete Products

2015-8-31  Lignin is a key raw material in conventional and mid-range water reducers, retarders, and other concrete admixtures. The supply imbalance stems from a shortage of seasoned pulp wood, coupled with unexpectedly high demand the first half of the year and a

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Preparation of Lignosulfonates from Biorefinery Lignins

EHR-LG, and CM-LG in the concrete, the compressive strength (28 days) of concretes increased from 38.4 Mpa to 41.6, 42.6, and 40.9 Mpa, respectively. These findings suggest that the lignosulfonate from biorefinery lignin by sulfomethylation can meet the industrial standards as water reducers for cement admixtures.

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Influence of organic components and inorganic

2019-4-2  Reeds are rich in inorganic silica and organic lignin, both of which are effective as concrete admixtures. Silica is typically amorphous and is used as a pozzolanic admixture to impart long-term strength to concrete. Lignin is used as a water reducer admixture, which reduces concrete water content or slows the setting rate.

Get Price

Lignin-based concrete plasticizer technology EurekAlert!

The technology will be scaled-up, and the lignin-based concrete admixtures will be developed with industrial partners in the LigniOx project, a Bio-Based Industries Joint Undertaking project ...

Get Price

SULFOMETHYLOLATED LIGNIN-BASED CONCRETE

The invention provides for an admixture for reducing the water content of a concrete mix. The admixture comprises an alkaline solution of a lignin in a sulfomethylolated form. The sulfomethylolated lignin in the admixture can also be cross-linked with a cross-linking agent. The admixture further comprises an

Get Price

Lignin shortage threatens concrete admixture market ...

2015-8-31  Lignin shortage threatens concrete admixture market. 31st August 2015. LignoTech USA, a supplier of lignin-based products to the concrete admixture industry, warns of a “critical supply imbalance” that will affect concrete admixture suppliers in north America. “This condition is expected to continue for the remainder of 2015 and requires ...

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Lignin-Based Hybrid Admixtures and their Role in Cement ...

In this study, a technology for obtaining functional inorganic-organic hybrid materials was designed using waste polymers of natural origin, i.e., kraft lignin and magnesium lignosulfonate, and alumina as an inorganic component. Al2O3-lignin and Al2O3-lignosulfonate systems were prepared by a mechanical method using a mortar grinder and a planetary ball mill, which made it possible to obtain ...

Get Price

Admixtures for Concrete - Memphis

2021-8-9  admixtures usually retard the setting time of concrete by one to three hours (Fig. 6-5). Some water-reducing admix-tures may also entrain some air in concrete. Lignin-based admixtures can increase air contents by 1 to 2 percentage points. Concretes with water reducers generally have good air

Get Price

Lignin supplier implements allocation ... - Concrete Products

2015-8-31  Lignin is a key raw material in conventional and mid-range water reducers, retarders, and other concrete admixtures. The supply imbalance stems from a shortage of seasoned pulp wood, coupled with unexpectedly high demand the first half of the year and a

Get Price

Effect of Chemical Characteristics of Alcell Lignin-Based ...

1994-9-1  The air-entraining effect of these samples was determined from the unit weight measurement of fresh cement mortar. The results of this testing indicated the importance of the chemical characteristics of sulfomethylolated lignin-based water-reducing admixtures on their effectiveness in cement mortar and concrete.

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Borregaard UK Ltd » Members Cement Admixtures

BLT is the world’s leading supplier of lignin based raw materials for concrete water-reducing agents. The Concrete Industry is the single biggest Global application for Lignosulphonates. BLT has more than 60 years’ experience supplying binding and dispersing agents based on Lignin Technology.

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Influence of organic components and inorganic

2019-4-2  Reeds are rich in inorganic silica and organic lignin, both of which are effective as concrete admixtures. Silica is typically amorphous and is used as a pozzolanic admixture to impart long-term strength to concrete. Lignin is used as a water reducer admixture, which reduces concrete water content or slows the setting rate.

Get Price

Preparation of Lignosulfonates from Biorefinery Lignins

EHR-LG, and CM-LG in the concrete, the compressive strength (28 days) of concretes increased from 38.4 Mpa to 41.6, 42.6, and 40.9 Mpa, respectively. These findings suggest that the lignosulfonate from biorefinery lignin by sulfomethylation can meet the industrial standards as water reducers for cement admixtures.

Get Price
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