TY  - JOUR
A1  - Mezhov, Alexander
A1  - Goncharov, A.
A1  - Zhutovsky, S.
A1  - Kovler, K.
A1  - Diesendruck, Ch. E.
T1  - The Impact of DNA as a Chemical Admixture for Cementitious Materials
JF  - Advanced Materials Technologies
N2  - Viscosity modifying agents (VMA) and superplasticizers (SP) are two common macromolecular admixture types for cementitious materials. VMAs are used to stabilize fresh cementitious materials, while SPs are used to disperse them. Most VMAs are bio-based polysaccharides that act in the water phase between particles; while most SPs are synthetic comb polymers, consisting of negatively charged backbones that help their adsorption to the cement particles' surface. The molecular structure of DNA contains elements of VMA – as it is a polysaccharide – and SP – as it is a polyanion. In this study, rheological measurements are used to compare how these three types of macromolecules (VMA, SP, and DNA) affect cementitious materials. It is found that DNA shows the combined effects of VMAs and SPs on cement paste: it lowers yield stress while at the same time maintaining or even increasing its viscosity, which permits reducing water content while avoiding bleeding or segregation of samples. Yet, the presence of DNA has a significant retardation impact on cement hydration, which is also a common side effect of VMAs and SPs.
KW  - Impact of DNA
KW  - Viscosity modifying agents (VMA)
KW  - Superplasticizers (SP)
PY  - 2025
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:b43-638542
DO  - https://doi.org/10.1002/admt.202500073
SN  - 2365-709X
VL  - 10
IS  - 14
SP  - 1
EP  - 8
PB  - Wiley-VCH GmbH
CY  - Weinheim
AN  - OPUS4-63854
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -