Davidovits' theory appears to be moving slowly from fringe toward mainstream.
Also the possibility of a mixed technique i.e. some carved stones along
with cast blocks offers a compromise in the debate.
why were the pyramids not made wholly of these cast stones? After all it is easier to cast a stone than to cut and hoist it into place. The answer, embedded in our finding, is simple: making geopolymeric stone was an expensive
proposition. For a primitive society, the fabrication of lime is non-trivial, especially the millions of tons that would have been required. Along the same lines, crushing tons of limestone is non-trivial either. Under these constraints, the ancient builders apparently compromised 
The quote goes along with a photograph (fig.6) showing distinctly the two types, the leading author, M. W. Barsoum, being a highky cited scientist (h=83) and the journal is a most academic one (J. Am. Ceram. Soc.). However there is an acknowledgement that some of the samples were provided by Davidovits. A more recent and no less academic work about Senefru's
pyramid by Barsoum et al.  states
results suggest that the casing stones consist of limestone grains from the Tura quarry, cemented with an amorphous calcium-silicate gel formed by human intervention, by the addition of extra silica, possibly diatomaceous earth, from the Fayium area.
A 2015 Springer Handbook of Materials Structures, Properties, Processing and
Performance  begins by mentioning the casting of blocks via ref.
M. W. Barsoum et al, (2006) Microstructural Evidence of Reconstituted Limestone Blocks in the Great Pyramids of Egypt, J. Am. Ceram. Soc., 89  3788–96 (pdf)
M. W. Barsoum et al,Were the casing stones of Senefru's Bent Pyramid
in Dahshour cast or carved?: Multinuclear NMR evidence, Mat. Lett.Vol. 65, Iss. 2, (2011),p 350-2
L. E. Murr, (2015), Examples of Materials Science and Engineering in Antiquity, Handbook of Materials Structures...p.12