Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 150-157 |
| Journal | Industrial Crops and Products |
| Volume | 74 |
| DOIs | |
| Publication status | Published - 2015 |
| MoE publication type | A1 Journal article-refereed |
Fingerprint
Keywords
- cement
- concrete
- soda lignin
- oxidation
- oxygen
- plasticizera
Cite this
}
Alkali-O2 oxidized lignin : A bio-based concrete plasticizer. / Kalliola, A. (Corresponding Author); Vehmas, Tapio; Liitiä, T.; Tamminen, T.
In: Industrial Crops and Products, Vol. 74, 2015, p. 150-157.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Alkali-O2 oxidized lignin
T2 - A bio-based concrete plasticizer
AU - Kalliola, A.
AU - Vehmas, Tapio
AU - Liitiä, T.
AU - Tamminen, T.
PY - 2015
Y1 - 2015
N2 - Commercial wheat straw soda lignin was used to develop an alkali-O2oxidation method to produce a ready-to-use solution for concrete plasticizing (cement dispersing). Lignin characterization was done directly from the solution. Depending on conditions, oxidation primarily induced either condensation or degradation of lignin. Thus, both the negative charge and the molar mass of the lignin were controlled by the oxidation parameters, and especially by pH. The oxidized lignins were evaluated for their plasticizing performance in cement pastes, mortar, and concrete. Also, their effect on cement hydration was followed and several other properties of fresh andmatured concrete were tested. A commercial lignosulfonate and petroleum-based superplasticizers were used as reference products.The results indicated that alkali-O2oxidation at moderately high lignin dry solids is a promising methodto produce a novel bio-based concrete plasticizer. The oxidized lignins were superior to the lignosulfonate and showed good performance in comparison to the superplasticizers.
AB - Commercial wheat straw soda lignin was used to develop an alkali-O2oxidation method to produce a ready-to-use solution for concrete plasticizing (cement dispersing). Lignin characterization was done directly from the solution. Depending on conditions, oxidation primarily induced either condensation or degradation of lignin. Thus, both the negative charge and the molar mass of the lignin were controlled by the oxidation parameters, and especially by pH. The oxidized lignins were evaluated for their plasticizing performance in cement pastes, mortar, and concrete. Also, their effect on cement hydration was followed and several other properties of fresh andmatured concrete were tested. A commercial lignosulfonate and petroleum-based superplasticizers were used as reference products.The results indicated that alkali-O2oxidation at moderately high lignin dry solids is a promising methodto produce a novel bio-based concrete plasticizer. The oxidized lignins were superior to the lignosulfonate and showed good performance in comparison to the superplasticizers.
KW - cement
KW - concrete
KW - soda lignin
KW - oxidation
KW - oxygen
KW - plasticizera
U2 - 10.1016/j.indcrop.2015.04.056
DO - 10.1016/j.indcrop.2015.04.056
M3 - Article
VL - 74
SP - 150
EP - 157
JO - Industrial Crops and Products
JF - Industrial Crops and Products
SN - 0926-6690
ER -